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Sagittarius and Scorpius in the pre-dawn sky, March 15, 2013, from the Painted Pony Resort, New Mexico. This is a stack of 5 x 4 minute exposures at f/2.8 with the 35mm lens and Canon 5D MkII at ISO 1600, with the ground from one image, plus a stack of 2 exposures through the Kenko Softon filter for the star glows.

13900612 - Sagittarius and Scorpius in the pre-dawn sky, March 15, 2013, from the Painted Pony Resort, New Mexico. This is a stack of 5 x 4 minute exposures at f/2.8 with the 35mm lens and Canon 5D MkII at ISO 1600, with the ground from one image, plus a stack of 2 exposures through the Kenko Softon filter for the star glows.

$The Pleiades star cluster, aka Seven Sisters, or M45, in Taurus. A deep exposure showing the reflection nebulosity which fills the area. This is a stack of 5 x 14 minute exposures with the TMB 92mm apo refractor and Borg 0.85x flattener/reducer at f/4.8 and Canon 5D MkII at ISO 800. Taken from home Oct 9/10, 2013.$

13900605 - The Pleiades star cluster, aka Seven Sisters, or M45, in Taurus. A deep exposure showing the reflection nebulosity which fills the area. This is a stack of 5 x 14 minute exposures with the TMB 92mm apo refractor and Borg 0.85x flattener/reducer at f/4.8 and Canon 5D MkII at ISO 800. Taken from home Oct 9/10, 2013.

A circumpolar star trail composite, shot at the old Larson Ranch site in the Frenchman Valley at Grasslands National Park, Saskatchewan, August 27/28, 2014. The pioneer cabin was the home of the legendary western author and movie star Will James, born Ernest Dufault in Quebec. He lived in this cabin when he worked the ranches in the area. The aurora was excellent this night. This is a stack of 20 1-minute exposures at ISO 2500 with the 15mm full-frame fish-eye lens at f/3.2 and the Canon 6D. The foreground and point-like stars are from the first frame in the series.

13900341 - A circumpolar star trail composite, shot at the old Larson Ranch site in the Frenchman Valley at Grasslands National Park, Saskatchewan, August 27/28, 2014. The pioneer cabin was the home of the legendary western author and movie star Will James, born Ernest Dufault in Quebec. He lived in this cabin when he worked the ranches in the area. The aurora was excellent this night. This is a stack of 20 1-minute exposures at ISO 2500 with the 15mm full-frame fish-eye lens at f/3.2 and the Canon 6D. The foreground and point-like stars are from the first frame in the series.

$The Carina Nebula (aka Eta Carinae) in the southern sky, shot December 11, 2012 from Timor Cottage, Coonabarabran, NSW, Australia. This is a stack of 5 x 12 minute exposures at ISO 400 with the Canon 5D MkII (filter modified) and Astro-Physics 105mm Traveler apo refractor and 6x7 field flattener.$

13900176 - The Carina Nebula (aka Eta Carinae) in the southern sky, shot December 11, 2012 from Timor Cottage, Coonabarabran, NSW, Australia. This is a stack of 5 x 12 minute exposures at ISO 400 with the Canon 5D MkII (filter modified) and Astro-Physics 105mm Traveler apo refractor and 6x7 field flattener.

The centre of the Galaxy in Sagittarius and Scorpius rising above the southeast horizon, from New Mexico, at the Painted Pony Resort. This is a stack of 5 x 5 minute exposures with the 24mm lens at f/2.8 and Canon 5D MkII at ISO 800. The landscape is from one exposure and shadow detail brought out. An additional image shot thru the Kenko Softon filter was layered in to add the star glows.

13899654 - The centre of the Galaxy in Sagittarius and Scorpius rising above the southeast horizon, from New Mexico, at the Painted Pony Resort. This is a stack of 5 x 5 minute exposures with the 24mm lens at f/2.8 and Canon 5D MkII at ISO 800. The landscape is from one exposure and shadow detail brought out. An additional image shot thru the Kenko Softon filter was layered in to add the star glows.

The Sagittarius Milky Way area, around the centre of the Galaxy, over the trees and campsite at Cypress Hills Interprovincial Park, Sasksatchewan. Taken August 17, 2012 at the Saskatchewan Summer Star Party. This is a composite of 6 exposures: all 2 minutes at f/2.8 and ISO 1600 with the Canon 5D MkII and Sigma 50mm lens, but 5 exposures were tracked and 1 exposure was untracked to prevent the ground from blurring. Ground is from the untracked exposure, sky is from the stack of 5 tracked exposures. All taken from the same location -- the ground is not faked onto a separate sky shot. The horizo

13899586 - The Sagittarius Milky Way area, around the centre of the Galaxy, over the trees and campsite at Cypress Hills Interprovincial Park, Sasksatchewan. Taken August 17, 2012 at the Saskatchewan Summer Star Party. This is a composite of 6 exposures: all 2 minutes at f/2.8 and ISO 1600 with the Canon 5D MkII and Sigma 50mm lens, but 5 exposures were tracked and 1 exposure was untracked to prevent the ground from blurring. Ground is from the untracked exposure, sky is from the stack of 5 tracked exposures. All taken from the same location -- the ground is not faked onto a separate sky shot. The horizo

The region of the Southern Cross, Crux, at left and around the Carina Nebula, at right. To the left of the Southern Cross is the dark Coal Sack. Open star clusters around the Carina Nebula are NGC 3532 (at upper left of nebula), IC 2602, the Southern Pleiades (below the nebula), and NGC 3114 (right of nebula). Taken on a hazy night, so the glows around stars are natural and not introduced from a filter. This is a stack of 5 x 6 minute exposures at f/2.8 with the Sigma 50mm lens and Canon 60Da at ISO 800, on the iOptron SkyTracker. Taken from Coonabarbran, NSW, Australia, March 22, 2014.

13899499 - The region of the Southern Cross, Crux, at left and around the Carina Nebula, at right. To the left of the Southern Cross is the dark Coal Sack. Open star clusters around the Carina Nebula are NGC 3532 (at upper left of nebula), IC 2602, the Southern Pleiades (below the nebula), and NGC 3114 (right of nebula). Taken on a hazy night, so the glows around stars are natural and not introduced from a filter. This is a stack of 5 x 6 minute exposures at f/2.8 with the Sigma 50mm lens and Canon 60Da at ISO 800, on the iOptron SkyTracker. Taken from Coonabarbran, NSW, Australia, March 22, 2014.

$Waxing crescent Moon with Earthshine, April 18, 2010. Taken with 5-inch (130mm) Astro-Physics apo refractor and Canon 7D camera, at f/6 and ISO 100. HDR stack of 9 exposures from 6 seconds to 1/40th second at 1-stop intervals. Combined in Photomatix Pro.$

13899313 - Waxing crescent Moon with Earthshine, April 18, 2010. Taken with 5-inch (130mm) Astro-Physics apo refractor and Canon 7D camera, at f/6 and ISO 100. HDR stack of 9 exposures from 6 seconds to 1/40th second at 1-stop intervals. Combined in Photomatix Pro.

$Omega Centauri globular cluster, with Canon 20Da camera with 4-inch Astro-Physics Traveler apo refractor at f/6 for 4 minutes each at ISO800. Stack of 4 exposures, averaged stacked. Plus short 2-minute exposure for core area. Taken from Queensland, Australia, July 2006.$

13899271 - Omega Centauri globular cluster, with Canon 20Da camera with 4-inch Astro-Physics Traveler apo refractor at f/6 for 4 minutes each at ISO800. Stack of 4 exposures, averaged stacked. Plus short 2-minute exposure for core area. Taken from Queensland, Australia, July 2006.

The waxing crescent Moon in the twilight sky behind a windmill water pump at City of Rocks State Park, New Mexico, Christmas Eve, December 24, 2014. This is a high dynamic range HDR stack of 7 exposures at 2/3rds stop intervals with the Canon 6D and 24mm lens.

13899115 - The waxing crescent Moon in the twilight sky behind a windmill water pump at City of Rocks State Park, New Mexico, Christmas Eve, December 24, 2014. This is a high dynamic range HDR stack of 7 exposures at 2/3rds stop intervals with the Canon 6D and 24mm lens.

$Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the$

13898997 - Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the

$Comet Lovejoy (C/2104 Q2) on the night of Dec. 27/28, 2014, as it was approaching the globular cluster M79 at upper right, in Lepus. This is a stack of 5 x 3 minute exposures at ISO 2500 with the Canon 5D MkII and TMB 92mm refractor at f/4.4. Taken from near Silver City, New Mexico.$

13898894 - Comet Lovejoy (C/2104 Q2) on the night of Dec. 27/28, 2014, as it was approaching the globular cluster M79 at upper right, in Lepus. This is a stack of 5 x 3 minute exposures at ISO 2500 with the Canon 5D MkII and TMB 92mm refractor at f/4.4. Taken from near Silver City, New Mexico.

Evening twilight with Venus in the sky, on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 8-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Rokinon 14mm manual lens at f/8. Some wind has blurred trees. From images _MG_7042 to 7049, taken at 2/3rd stop increments.

13898845 - Evening twilight with Venus in the sky, on December 3, 2013 from Massai Point, Chiricahua National Monument, Arizona. This is a 8-frame HDR High Dynamic Range stack to compress the high contrast from the bright sky and dark foreground into one image. Combined with Photomatix Pro. Taken with the Canon 5D MkIi and Rokinon 14mm manual lens at f/8. Some wind has blurred trees. From images _MG_7042 to 7049, taken at 2/3rd stop increments.

The quarter Moon reflected in the waters of Reesor Lake, Alberta in Cypress Hills Interprovincial Park. Taken on July 5, 2014. This is with the 14mm Rokinon lens and Canon 6D at ISO800. This is a high dynamic range stack of 6 exposures from 1/15 to 0.6 seconds taken just before using the camera to take a motion control time-lapse. The Moon was in conjunction with Mars (right of Moon) and Spica (left of Moon) but in the bright twilight they are not showing up here.

13898528 - The quarter Moon reflected in the waters of Reesor Lake, Alberta in Cypress Hills Interprovincial Park. Taken on July 5, 2014. This is with the 14mm Rokinon lens and Canon 6D at ISO800. This is a high dynamic range stack of 6 exposures from 1/15 to 0.6 seconds taken just before using the camera to take a motion control time-lapse. The Moon was in conjunction with Mars (right of Moon) and Spica (left of Moon) but in the bright twilight they are not showing up here.

The North America Nebula (NGC 7000) and Pelican Nebula (IC 5070) area near Deneb in Cygnus. Taken from home July 24, 2012 with Canon 5D MkII camera at ISO 800 and Canon 200mm L-series lens at f/3.5 for stack of 2 x 5 minutes exposures, mean combined, plus 2 x 5 minute exposures with haze in sky which added the star glows.

13898268 - The North America Nebula (NGC 7000) and Pelican Nebula (IC 5070) area near Deneb in Cygnus. Taken from home July 24, 2012 with Canon 5D MkII camera at ISO 800 and Canon 200mm L-series lens at f/3.5 for stack of 2 x 5 minutes exposures, mean combined, plus 2 x 5 minute exposures with haze in sky which added the star glows.

$Open cluster pair of NGC 2451 (right), a bright loose cluster, and NGC 2477 (left), a fainter but very rich open cluster. The field is also filled with faint emission nebulosity. Taken from Timor Cottage, Coonabarabran, NSW, Australia, December 12, 2010. This is a stack of 5 x 6 minute exposures at ISO 1600 with Canon 5D MkII camera on 105mm Astro-Physics Traveler apo refractor at f/5.8 with 6x7 field flattener.$

13898239 - Open cluster pair of NGC 2451 (right), a bright loose cluster, and NGC 2477 (left), a fainter but very rich open cluster. The field is also filled with faint emission nebulosity. Taken from Timor Cottage, Coonabarabran, NSW, Australia, December 12, 2010. This is a stack of 5 x 6 minute exposures at ISO 1600 with Canon 5D MkII camera on 105mm Astro-Physics Traveler apo refractor at f/5.8 with 6x7 field flattener.

$Messier 81 (the spiral galaxy below) and M82 (the irregular galaxy on top) in Ursa Major. M81 is Bode’s Galaxy, while M82 is the Cigar Galaxy. The galaxy at bottom left is NGC 3077 This is a stack of 10 x 10-minute exposures with the Canon EOS Ra camera at ISO 800 through the Astro-Physics 130mm apo refractor at f/6 with the 6x7 field flattener lens. Taken April 24/25, 2020. North is up in this view.$

13898077 - Messier 81 (the spiral galaxy below) and M82 (the irregular galaxy on top) in Ursa Major. M81 is Bode’s Galaxy, while M82 is the Cigar Galaxy. The galaxy at bottom left is NGC 3077 This is a stack of 10 x 10-minute exposures with the Canon EOS Ra camera at ISO 800 through the Astro-Physics 130mm apo refractor at f/6 with the 6x7 field flattener lens. Taken April 24/25, 2020. North is up in this view.

NGC 7000 and Pelican Nebula with TMB 92mm apo and Canon 5D Mk II on a superb night, with stack of 2 x 15 minutes + 2 x 12 minutes at ISO400 and Borg 0.85x flattener/reducer for f/4.6. Standard exposure is 12 minutes but the night was so good I did two at 15 minutes with no problem.

13897734 - NGC 7000 and Pelican Nebula with TMB 92mm apo and Canon 5D Mk II on a superb night, with stack of 2 x 15 minutes + 2 x 12 minutes at ISO400 and Borg 0.85x flattener/reducer for f/4.6. Standard exposure is 12 minutes but the night was so good I did two at 15 minutes with no problem.

13774798 - Eroded Islet And Rock Stack At Sea In Galapago

13772556 - A Sea Stack Rises Out Of The Bedrock While Waves Crash Against It Along The Beaches Of The East Fjords; Iceland

Marsden Rock, a 100 feet sea stack of periclase and Magnesian Limestone which lies approximately 100 yards off the main cliff face; South Shields, Tyne and Wear, England

13777158 - Marsden Rock, a 100 feet sea stack of periclase and Magnesian Limestone which lies approximately 100 yards off the main cliff face; South Shields, Tyne and Wear, England

13777159 - Lot's Wife Sea Stack, Marsden Bay; Tyne and Wear, England

71391714 - Cliffs of Downpatrick Head and Dun Briste sea stack. Sunset. sunstar. Knockaun, Lackan, County Mayo, Ireland.

71391713 - Cliffs of Downpatrick Head and Dun Briste sea stack. Sunset.. Knockaun, Lackan, County Mayo, Ireland.

71388029 - Road to South Stack Lighthouse, Anglesey, Wales, United Kingdom. Light. rock island.

71412899 - USA, Oregon, Bandon. Moonset and sea stack.

71410824 - Sea Stack and black sand beach near Vik, Iceland

71387648 - View along cliffs to Witches Finger, sea stack. Vagar, Faeroer. dark rain clouds.

71387647 - View along cliffs to Witches Finger, sea stack. Vagar, Faeroer. dark rain clouds.

71411415 - USA, Oregon, Bandon. Face Rock sea stack at sunset

13816404 - Wild flowers on the cliffs above South Stack lighthouse at sunset, South Stack, Anglesey, North Wales, United Kingdom, Europe

71419016 - Sea Stack and Rocks, Salt Creek Recreation Area, Clallam County, Washington State

71415719 - USA, Oregon, Bandon. Sunset on Face Rock sea stack

13816405 - Wild flowers on the cliffs above South Stack lighthouse at sunset, South Stack, Anglesey, North Wales, United Kingdom, Europe

Aerial view of Suwehan white sandy beach with turquoise sea water and the big rock (sea stack) in the sea seen from a drone, Nusa Penida, Klungkung regency, Bali, Indonesia, Southeast Asia, Asia

14142579 - Aerial view of Suwehan white sandy beach with turquoise sea water and the big rock (sea stack) in the sea seen from a drone, Nusa Penida, Klungkung regency, Bali, Indonesia, Southeast Asia, Asia

14140712 - Cliffs and South Stack Lighthouse at sunset, Holy Island, Anglesey, Wales, United Kingdom, Europe

13833030 - Curing andouille in the chimney stack, house of andouille, maison rivalan quidu, guemene sur scorff, morbihan, brittany

13832379 - Old coastal road with Ilheus da Rib and Ribeira da Janela sea stack rocks on background, Porto Moniz, Madeira, Portugal

13822619 - The Wizard's hat sea stack reflecting on low tide on Bandon Beach at dawn. Bandon, Coos county, Oregon, USA.

13832403 - Sea stack rocks hit by ocean waves, Sao Lourenco Peninsula, Canical, Madeira island, Portugal

14140772 - Elin's Tower at dusk, RSPB South Stack, Holy Island, Anglesey, Wales, United Kingdom, Europe

13822621 - The Wizard's hat sea stack reflecting on low tide on Bandon Beach at dawn. Bandon, Coos county, Oregon, USA.

13817378 - Yesnaby Sea Stack, West Mainland, Orkney Islands, Scotland, United Kingdom, Europe

13709259 - Birds covering a sea stack at the cliffs at the southern end of the island of Bjornoya, Svalbard, Norway, Europe

$A gap between a stack of balanced boulders on a cliff east of Grandview Point at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America\n$

13928074 - A gap between a stack of balanced boulders on a cliff east of Grandview Point at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America\n

Waves crashing against rock stack at Cabo Carvoeiro in evening sunlight with Ilha da Berlenga in the distance, Peniche, Centro Region, Estremadura, Portugal, Europe

13819168 - Waves crashing against rock stack at Cabo Carvoeiro in evening sunlight with Ilha da Berlenga in the distance, Peniche, Centro Region, Estremadura, Portugal, Europe

$View of Grand Canyon and a rock spire from within a gap between a stack of balanced boulders at Grandview Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America\n$

13928075 - View of Grand Canyon and a rock spire from within a gap between a stack of balanced boulders at Grandview Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America\n

13997660 - South Stack Lighthouse at sunset,Anglesey,Holy Island,Wales,Great Britain,United Kingdom,Europe

13817379 - Yesnaby Sea Stack, West Mainland, Orkney Islands, Scotland, United Kingdom, Europe

Palmarola sea stack called Faraglione di Mezzogiorno,aerial view,Palmarola island,Ponza municipality,Tyrrhenian Sea,Pontine islands,Latina Province,Latium (Lazio),Italy,Europe

13997732 - Palmarola sea stack called Faraglione di Mezzogiorno,aerial view,Palmarola island,Ponza municipality,Tyrrhenian Sea,Pontine islands,Latina Province,Latium (Lazio),Italy,Europe

13997658 - South Stack Lighthouse at sunset,Anglesey,Holy Island,Wales,Great Britain,United Kingdom,Europe

71402419 - modern quarter of merihaka with the smoke stack of the hanasaari electric plant at nightfall, helsinki, finland, europe

Flowering plants framing the sea stack rocks of Ilheus da Rib and Ribeira da Janela, Porto Moniz, Madeira island, Portugal, Atlantic, Europe

71405478 - Flowering plants framing the sea stack rocks of Ilheus da Rib and Ribeira da Janela, Porto Moniz, Madeira island, Portugal, Atlantic, Europe

71405491 - Majestic pinnacle of sea stack rock hit by waves, Sao Lourenco viewpoint, Canical, Madeira island, Portugal, Atlantic, Europe

View of the huge sea stack called Dun Briste at Downpatrick Head from the surrounding cliffs. Ballycastle, County Mayo, Donegal, Connacht region, Ireland, Europe.

71359265 - View of the huge sea stack called Dun Briste at Downpatrick Head from the surrounding cliffs. Ballycastle, County Mayo, Donegal, Connacht region, Ireland, Europe.

71359264 - View of the huge sea stack called Dun Briste at Downpatrick Head from the surrounding cliffs. Ballycastle, County Mayo, Donegal, Connacht region, Ireland, Europe.

71359266 - View of the huge sea stack called Dun Briste at Downpatrick Head from the surrounding cliffs. Ballycastle, County Mayo, Donegal, Connacht region, Ireland, Europe.

71359263 - View of the huge sea stack called Dun Briste at Downpatrick Head from the surrounding cliffs. Ballycastle, County Mayo, Donegal, Connacht region, Ireland, Europe.

71367622 - Sea stack at dawn at Second Beach, La Push, Clallam county, Washington State, United States of America, North America

70120113 - Stack of fire wood under a window of Alpine hut, Wilder Kaiser, Kaiser mountain range, Tyrol, Austria

70204210 - Europe, Germany, Bavaria, Munich, Bavarian State Library, library assistant with a book mobile in a book stack

70443629 - Hay stack near Magura, Transylvania, Romania

70309882 - Stack of books near two black armchairs, Grandhotel Heiligendamm Kempinski, heiligendamm, Germany

70304482 - Boy on sea stack

10292304 - Stack of stainless steel bowls, pot and cutlery in pouch on table, elevated view

71130404 - view through a small window within a stack of birch firewood, Vastergotland, Sweden

70306606 - Weather vane on a wooden stack at beach, St. Peter Ording, Schleswig-Holstein, Germany

70232194 - Hay stack and farm house in the South Tyrolean local history museum at Dietenheim, Puster Valley, South Tyrol, Italy

70304481 - Sea stack with sailingboat in background

70015244 - South Stack Lighthouse, South Stack near Holyhead Europe, Wales

70489777 - Hay stack in Spreewald, Spree, UNESCO biosphere reserve, Lehde, Luebbenau, Brandenburg, Germany, Europe

71053085 - Stack of wood and fresh herbs in front of alpine hut, Chiemgau Alps, Upper Bavaria, Bavaria, Germany

70232196 - Farmhouse and hay stack in the South Tyrolean local history museum at Dietenheim, Puster Valley, South Tyrol, Italy

71034019 - Rock formation known as Gada's Stack on Foula Island, Shetlands, Scotland, United Kingdom, Europe

71043477 - Stack of prayer stones on Isla del Sol (Island of the Sun) at sunset, Lake Titicaca, Bolivia, South America

71323951 - HIKER STANDING ON THE EDGE OF A GRASS-COVERED CLIFF CONTEMPLATING THE ARCHED SEA STACK OF DRANGARNIR, VAGAR, FAROE ISLANDS, DENMARK

71135684 - Late afternoon misty sunlight over cliffs near South Stack, Ynys Lawd, North Anglesey, Wales, United Kingdom, Europe

71025211 - Sea stack rock formations near beach cliffs, Eastern Fjords, Iceland, Iceland

70384139 - Sea stack off Tumbledown Bay, dawn, southern bays of Banks Peninsula, Canterbury, New Zealand.

70198058 - Sea stack. Olympic National Park. Washington. USA

70197857 - Limestone sea stack near Ko Hua Khwan, Ao Nang. Krabi, Thailand

France, Dordogne, Perigord Noir, Vezere Valley, prehistoric site and decorated cave listed as World Heritage by UNESCO, Peyzac le Moustier, La Roque Saint Christophe Cliff, troglodytic site dating of the Prehistory, medieval stack machines reconstitution under the rock shelter (aerial view)

71329495 - France, Dordogne, Perigord Noir, Vezere Valley, prehistoric site and decorated cave listed as World Heritage by UNESCO, Peyzac le Moustier, La Roque Saint Christophe Cliff, troglodytic site dating of the Prehistory, medieval stack machines reconstitution under the rock shelter (aerial view)

Surf breaking on sea stack and the Penon rock at this far south Nicoya Peninsula beach, Santa Teresa, Puntarenas, Costa Rica, Central America

71081223 - Surf breaking on sea stack and the Penon rock at this far south Nicoya Peninsula beach, Santa Teresa, Puntarenas, Costa Rica, Central America

71046549 - The distinctive sea stack Hvitserkur (White Shirt), Vatsnes Peninsula, North coast, Iceland, Polar Regions

Spectacular 300-400m high cliffs on west coast of Sandoy, Oknadalsdrangur sea stack in foreground, Sandoy, Faroe Islands (Faroes), Denmark, Europe

71045579 - Spectacular 300-400m high cliffs on west coast of Sandoy, Oknadalsdrangur sea stack in foreground, Sandoy, Faroe Islands (Faroes), Denmark, Europe

70358660 - Woman balancing in one hand tall stack of water bottles, one bottle in other hand

70287969 - Apple on stack of books

71351645 - The boathouse at the southern end of Loch Stack, in the North West Highlands of Scotland, captured at sunrise in late October.

71088098 - Sea stack rock formation on beach at Cape Blanco State Park, Oregon, USA

Looking towards the Irish Lady stack and Dr Syntax's Head from the cliffs of Pedn-men-du, Lands End, Cornwall, England, United Kingdom, Europe

71048309 - Looking towards the Irish Lady stack and Dr Syntax's Head from the cliffs of Pedn-men-du, Lands End, Cornwall, England, United Kingdom, Europe

71045553 - Mount Bulandstindur, 1069m, pyramid shaped stack of basaltic strata, in Berufjordur, East Fjords, Iceland, Polar Regions

71034699 - Rock formation known as Gada's Stack on Foula Island, Shetlands, Scotland, United Kingdom, Europe

10094121 - Stack of purple satin and silk cushions on red shell chair

A temporary clearing in thick fog during a temperature inversion over the Irish Sea at dusk, South Stack, RSPB tower on clifftop, Anglesey, Wales, United Kingdom, Europe

71135686 - A temporary clearing in thick fog during a temperature inversion over the Irish Sea at dusk, South Stack, RSPB tower on clifftop, Anglesey, Wales, United Kingdom, Europe

71085072 - South Stack Lighthouse, Angelsey, Wales, United Kingdom, Europe

71045554 - Mount Bulandstindur, 1069m, pyramid shaped stack of basaltic strata, in Berufjordur, East Fjords, Iceland, Polar Regions

71034018 - Rock formation known as Gada's Stack on Foula Island, Shetlands, Scotland, United Kingdom, Europe

71034017 - Rock formation known as Gada's Stack on Foula Island, Shetlands, Scotland, United Kingdom, Europe

70416906 - The Faraglioni sea stack rocks on the Island of Capri, Campania, Italy