Yellowstone covers parts of Wyoming, Montana and Idaho. The huge park covers 2,219,791 acres!
Yellowstone became a national park in 1872, when President Ulysses S. Grant signed The Act of Dedication law.
Old Faithful is a geyser with an appropriate name! It will erupt every 44 to 125 minutes and will shoot out 3,700 US gallons of boiling water!
The Yellowstone Caldera is home to a massive supervolcano! The last "supereruption" was 630,000 years ago.
Yellowstone is home to its own Grand Canyon, created by the Yellowstone River which is 692 miles (1,114 km) long.
The Grand Prismatic Spring is a beautiful sight, but it is certainly not suitable for bathing!
Steamboat Geyser has been known to shoot out water to heights of 300 ft, making it the world's tallest currently-active geyser!
Yellowstone National Park is home to grizzly bears, wolves, coyotes, elk, bison, moose, goats, cougars and many other animals!
There is a large petrified forest in Yellowstone. A petrified forest is created when the trees are covered in ash and volcanic debris!