Yellowstone National Park

Yellowstone National Park is the world's first national park, established in 1872, and sits atop one of the planet's largest volcanic calderas. It is home to more geothermal features than anywhere else on Earth, including Old Faithful geyser, the Grand Prismatic Spring, and thousands of hot springs. The park's vast wilderness supports wolves, grizzly bears, bison, and elk, making it a premier wildlife-watching destination.