YELLOWSTONE

Here are some lesser-known facts about Yellowstone National Park:

Yellowstone is an active supervolcano

Yellowstone sits on top of one of the world's largest volcanoes, the Yellowstone Caldera. The caldera was formed by an eruption 640,000 years ago.

Yellowstone is home to more than half of the world's geothermal features

Yellowstone has more than 10,000 hydrothermal features, including over 300 active geysers.

Yellowstone is home to bison that have lived there since prehistoric times

Yellowstone is the only place in the United States where bison have lived continuously since prehistoric times.

Yellowstone has about 290 waterfalls, including the Lower Falls of the Grand Canyon of the Yellowstone, which is 308 feet tall.

Yellowstone has many different types of animals

Yellowstone is home to at least 67 species of mammals, including bison, moose, bighorn sheep, mountain goats, and white-tailed deer. It also has about 300 species of birds and 16 species of fish.

Yellowstone is larger than Rhode Island and Delaware combined, covering 63 miles north to south and 54 miles east to west.

Yellowstone was managed by the United States Army for three decades
The United States Army managed Yellowstone National Park from 1886 to 1918.