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Making America's Best Idea Even Better
Yellowstone National ParkBear walking on horizon as sun sets.
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Yellowstone National Park
Yellowstone Geology
Geologic Highlights of Park Areas

Hydrothermal Features
Reports by Park Geologists
Scientists' Talks (Video-on-demand)
Roosevelt Arch at Yellowstone's North Entrance  

Did You Know?
The Roosevelt Arch is located at the North Entrance to Yellowstone National Park. The cornerstone of the arch was laid by President Theodore Roosevelt.

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Last Updated: July 25, 2006 at 12:22 EST