Here are some of the smaller kivas. Chacoan kivas are enclosed with square rooms and contain a sub-floor vault, a sub-floor vault, a sub-floor ventilation system, a firepit, a low masonry bench encircling the base of the room, and pilasters (masonry boxes) built on the benches to support the roof. You'll see a better example later in my photos. chacoarchive.org/cr ... ito/