Mesa Verde National Park is unlike any of the other national parks in Colorado.

The National Parks Service states on their website,

Mesa Verde, Spanish for green table, offers a spectacular look into the lives of the Ancestral Pueblo people who made it their home for over 700 years, from AD 600 to 1300. Today the park protects nearly 5,000 known archeological sites, including 600 cliff dwellings. These sites are some of the most notable and best preserved in the United States.

Mesa Verde is open year-round, but some areas are seasonal.They recommend checking what's open and closed ahead of time to get the most out of your trip.