Advice from a Cliff Dwelling - Don't go down in ruins!
Cliff dwellings are formed using niches or caves in high cliffs. Archaeologists recognize two types: The cliff house which is built on levels in the cliff and the cavate which is dug out using natural recesses or openings. Many of the most famous are in North America in Arizona, New Mexico, Utah, Colorado and Chichuahua. The best preserved is Mesa Verde in Colorado which was established around 1190.