This site was inhabited for about a thousand years beginning in 300 AD. At about 1296 AD the Anasazi from Mesa Verde may have moved here and constructed the main tower as determined from the architecture. The cliff walls are about 700 feet at this site. Discovery of two well preserved mummies led members of an 1880 archeological expedition to call this site Mummy Cave Ruins. The traditional Navajo name for this impressive ruin translates to "House Under the Rock".