Fall color and rock formations casting reflections in calm water. Reflection of autumn foliage in water, Canada Clouds reflected on the smooth waters of Iskwasum Lake Polar bear, Ursus maritimus, on pack ice at water's edge. A water lily pad holds droplets of rain The slow waters of wetlands stir fallen leaves creating spots of blurred yellow A cascade of water thunders over Niagara Falls.; Niagara Falls, New York. Blue water, Colorado River, Grand Canyon National Park, Arizona. Steller Sea lions take to the waters of the Gulf of Alaska amid foam and spray Banff Park landscape with fog and reflections, Banff National Park, Alberta, Canada View of Moraine Lake with low-lying clouds at one end, Alberta, Canada Low tide reveals star fish and other sea creatures, Queen Charlotte Islands, Canada Sunset over a Chesapeake Bay shoreline.; Kent Island, Maryland. Waterfall in between fall colors in a forest A group of caimans wait for fish, Pantanal, Brazil Orange sunset over a lake Cloud to ground lightning strike during intense summer thunderstorm A stone bridge crosses the headwaters of the Susquehanna River, New York Sandhill cranes silhouetted against a twilight sky, Nebraska A clump of grasses is framed by reflections of sky and trees in the lake, Bighorn National Forest, Wyoming Scenic view of a lake in Jasper National Park in Canada Grand Prismatic Spring, aerial view, Yellowstone National Park Providenciales Island, Turks and Caicos Islands A view of Death Lake and the surrounding forests and cliffs, Northwest Territories, Canada Sculpted icebergs under clouds near the shore of Couverviller Island. Scenic Travertine Falls on the Little Colorado River. Autumn view shows fallen leaves on rocks next to a mountain stream Cascades along Deer Creek in slot canyon, Grand Canyon National Park. Cirque of the Towers, Lonesome Lake, Popo Agie Wilderness, Wyoming View of the Colorado River flowing through Nankoweap Canyon. Scenic Deer Creek Falls in Grand Canyon National Park. Cormorant fisherman poles a bamboo raft near limestone karst mountains, Li River, People's Republic of China Painted Desert, Petrified Forest National Park, Arizona. Colorado River, Marble Canyon, Grand Canyon National Park, Arizona. Adelie penguins walk on a beach where a cruise ship is anchored. Old man practicing Tai Chi