Around 1200 CE the Sinagua began to build the beautiful five-story, 20-room Montezuma Castle, into an overhang in a limestone cliff above Wet Beaver Creek. Standing guard above a now mostly vanished 45-room pueblo, Montezuma Castle sheltered up to 300 people and was accessible only by climbing long, steep ladders.
Several miles up the creek is another Sinagua ruin, set into the crater wall of Montezuma Well. The well formed when a gigantic limestone cavern created by an underground hot spring collapsed, leaving a crater in the hill. Nearby Wet Beaver Creek cut an outlet through the well's base and the 1,000-gallon-per-minute spring at the bottom of the 55-foot-deep well maintained a constant water flow. The valley's earliest inhabitants discovered the well and used the outlet to provide a steady supply of water to their hand-built community irrigation system.
The irrigation system they built was so good that when the Euro-Americans arrived several hundred years later, they only had to clean the silt out and the water was flowing again. However, because the ruins of Montezuma were so accessible to the general public, they were thoroughly looted before any governmental protection happened. Much of the story of the people who lived there so long ago was lost to a people who had no culture.
There have been successful archaeological excavations in the area. The results of those show the structures were progressively built starting around 1200 CE and were abandoned by 1400 CE, like most of the rest of the Hohokam and Mogollon world.
Some Native American legends hold that our world, the Fourth World, started here long ago. Human beings fled the first three worlds just ahead of rising floodwaters caused by gods disgusted with human strife, greed and deceit. Human beings wiggled through this hole in the roof of the Third World, the floodwaters rose into the well and then halted, for now.