Top 10 Most Visited National Parks in the US

6. Yellowstone National Park

Yellowstone National Park was the first national park in the world and at 28,000 square miles, it is larger than some U.S. states and one of the largest, nearly intact temperate-zone ecosystems on Earth. Yellowstone was established as the world’s first national park to protect geothermal areas that contain about half the world's active geysers, the park also forms the core of the Greater Yellowstone Ecosystem and to preserves a great variety of terrestrial, aquatic, and microbial life. Nearly 90 percent of the park has barely been touched or altered by human. This makes the park an invaluable natural reserve and reservoir of information. Yellowstone National Park has some of the Earth’s most active volcanic, hydrothermal (water + heat), and earthquake systems. Underneath Yellowstone, there lies one of the world's largest volcanoes. Yellowstone is one of the most seismically active areas in the United States. Approximately 1,000 to 3,000 earthquakes occur each year in the Yellowstone area; most are not felt. Visitors couldn’t help but wonder if there is a cataclysmic eruption of the Yellowstone volcanoes. The answer is very unlikely. With new technology to monitor the seismic activities and ground deformations help to detect earthquakes and foreseeable events to ensure public safety. Every year, an average of 3 to 4 million visitors came to witness the hidden power of nature rising up and exploded in colorful hot springs and geysers. In 2016, Yellowstone National Park was ranked at #6 most visited national park in US with 4.25 million spectators.