Yellowstone is one of the most geologically dynamic areas on earth thanks to the shallow source of magma and resulting volcanic activity. One of the largest volcanic eruptions known to have occurred in the world happened here, creating one of the largest known calderas. More than 10,000 hydrothermal features can be found here. Click on the links below for more information:
Did You Know?
At peak summer levels, 3,500 employees work for Yellowstone National Park concessioners and about 800 work for the National Park Service.