1. Mesa Verde National Park (Colorado)

Mesa Verde National Park, established in 1906, protects some of the most remarkably preserved Ancestral Puebloan cliff dwellings in North America. Dating back to the late 12th century, these intricate stone homes are ingeniously built into steep canyon walls, showcasing the innovation and resilience of Indigenous communities. Visitors marvel at the ancient architecture and gain a rare, tangible glimpse into life centuries before European contact, making Mesa Verde a destination that rivals the world’s most storied archaeological sites.