3. Yellowstone National Park, Wyoming, Idaho, Montana

Established in 1872, this is park spans over 3,400 square miles with territory in Idaho, Montana, and Wyoming. Yellowstone is one of the world’s most well-known parks and is greeted by millions of visitors each year. This area is also home to the continent’s largest super volcano. From this, the park contains amazing geothermal features in addition to historical locations, beautiful views, and so many lakes, streams, hiking trails, and wildlife you will have to make another trip to see it all.