Common to Southwest architecture is the adobe building. Once used by prehistoric inhabitants of the Southwest and later historic settlers, the adobe building is created by stacking mud and straw bricks and then covering them with a plaster of fine clay and water, making a hard, almost water tight outer surface for the structure. Though no longer used in their traditional form (in most areas) their influence can be seen through the Southwest, most notably in Santa Fe, New Mexico. The above photo was taken of a faux adobe building on Route 66 in downtown Flagstaff. They even included roof beams in the artificial facade. Today, the building houses, very appropriately, a gallery of Southwest photography.