Hidden in the cliffs of southwestern Colorado, Mesa Verde National Park preserves hundreds of ancient dwellings built by the Ancestral Pueblo people more than 700 years ago. Visitors today can explore cliffside villages, climb ladders into stone rooms, and discover one of the most remarkable archaeological sites in North America.

Serpent Mound in Ohio is one of the most mysterious ancient earthworks in North America. Discover the story behind the giant serpent-shaped landmark and how to visit it today.