Yellowstone National Park
America's National Parks
An Alaskan brown bear sow and cub cross a stream in Glacier Bay National Park, Alaska, in this undated photo.
A heavily-oiled bird is seen after being rescued from the waters of Barataria Bay, which are laden with oil from the Deepwater Horizon spill, in Plaquemines Parish, La., on June 26.
Rare and Beautiful Natural Phenomena
Image 19 of 19
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