This is a spring house, built into a cliff wall in the Flagstaff, Arizona area. An earlier settler built this one, and another one behind me that you can’t see in this photo. They did this to collect water from a spring to ensure they had enough water. A wall is built around the spring to collect water instead of letting it run off, and the spring house protects the water. The problem is, the animals in the area that relied on this spring for water no longer have access to it, and must find water elsewhere.
To give you an idea of size, the door is about 3 feet (0.9 meters) tall.
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