Yellowstone National Park

Yellowstone National Park was the first national park in the United States.  Located mainly in Wyoming, partly in Montana and Idaho, it was established on March 1, 1872, when President Ulysses S. Grant signed an act of Congress.  It was the world's first national park.  Yellowstone is known for its rich wildlife and geothermal resources, and Old Faithful is one of its most famous attractions.