A UNESCO World Heritage site located in Colorado, Mesa Verde National Park offers a stunning look into the lives of ancient Native American cultures. After strolling through this ancient cliff dwellings, be sure to pay a visit to the Chapin Mesa Archeological Museum for another layer of edification
Arches Park in Utah is best known for preserving over 2,000 sandstone arches that are downright otherworldly. Don't visit the park without seeing the Delicate Arch, which is far and away the most prominent site.
Canyonlands National Park in southeastern Utah (not far from the town of Moab) is especially popular for recreation. Hiking, four-wheeling, mountain biking, and backpacking are all common activities along the park's many remote trails, while kayakers and rafters enjoy paddling along the Green River and Colorado River.
There's tons to see and do in Wyoming's Yellowstone National Park, of course, but the ethereal Morning Glory pool is a must-visit. The iridescent, striking color of the pool is a result of bacteria that inhabit the waters.
Acadia National Park, located on Mount Desert Island north of Portland Maine, was established as the first national park east of the Mississippi. Wealthy families like the Rockefellers and Vanderbilts flocked to this stunning region and actually built a lot of the infrastructure.