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On March 1, 1872 President Ulysses S. Grant signed into existence the world's first national park, Yellowstone National Park. The 2.2 million acres of wilderness is the only complete mid-latitude ecosystem left on the planet.
National Parks Exploration Series: Great Smoky Mountains
America's National Parks: An Eagle's View
National Parks Exploration Series: Acadia - The First National Park East of the Mississippi
Smoky Mountain Park Rangers
Missing 411: The U.F.O. Connection
Rainforest First: Climate Protection in Central Africa
For All People, For All Time
The Mountain
Saved by the Lioness
North America's National Parks
Gates of the Arctic
Wild National Parks
Becoming Acadia
Yellowstone: The Mystery of the Wolves
National Parks Exploration Series: The Everglades
Parks and People: Dope
Great natural monuments - Grand Canyon
Big Bend: The Wild Frontier of Texas
