The remains of Threatening Rock which split off the canyon wall and fell in 1941. Part of Pueblo Bonito was damaged by the fall. Prehistoric inhabitants had tried to shore up Threatening Rock, as did people in the 1920's and 1930's.
A different view of the kiva from that of the NPS. This shows the sockets that held the posts that supported the roof. The posts were made from large logs carried to Chaco from 70 miles away.