Southwestern Colorado near Durango is home to the wonderful Mesa Verde National Park. Like most national parks, Mesa Verde contains some beautiful scenery but it's ancient cave dwellings are what make it world famous. In fact, it's Cliff Palace, shown in this image, is thought to be the largest cliff in North America. The Cliff Palace was inhabited by ancient Pueblo people between 550 AD to 1300 AD and often referred to as the Anasazi (Navajo for "Ancient Ones" or "Ancient Enemy"). The Anasazi kept no written records and it is hard to learn about their life other that the men were hunters and farmers while the woman were skilled in basket weaving. They mysteriously disappeared from the Cliff Palace and it is speculated that they left the are after a 24 year drought.
Walking among the adobe structures is like walking on hallowed ground. The Cliff Palace is a remarkable structure that is even more amazing that it was built about 1,500 years ago and still is in great shape. I highly recommend a visit to Mesa Verde if you are ever in southwest Colorado.