Mesa Verde National Park
Sure, you probably knew about this place already, and why not? People have been coming here since 7,500 BCE. (And you thought complaining about people moving to Colorado was just a 2015 thing.) At this national park, there are 4,000 sites and 600 cliff dwellings where people lived up until 1265, and while most visitors head to Cliff Palace, the smart move is to go against the crowd, and try the lesser-known but just as striking sights at Wetherill Mesa.