13882186 - Herd of American bison (Bison bison) grazing and keeping warm near the famous geyser, Old Faithful, with clouds of steam rising into the clear blue sky in the Upper Geyser Basin; Yellowstone National Park, United States of America71081547 - Keeping warm by soaking up the winter sun.71081546 - Keeping warm by soaking up the winter sun.71161284 - Portrait Of A Climber Keeping Warm Beside An Alpine Bonfire13882165 - American Bison (Bison bison) lying on the warm ground next to Castle Geyser erupting with thermal steam into the air over the winter landscape in the Upper Geyser Basin at sunrise, Yellowstone National Park; Wyoming, United States of America13777546 - Castlebawn on the banks of Lough Derg surrounded in fog and mist at sunrise in autumn; Ogonnelloe, County Clare, Ireland