Pueblo Bonito was begun in 850 CE and had bursts of expansion over the course of 300 years. It was sited near the canyon wall and the last expansion literally next to a large slab of sandstone called by us..."Threatening Rock." In 1941 Threatening Rock became "Fallen Rock" and fell on top of 37 rooms in Pueblo Bonito. You can see where the rock fell in the picture I took of the Pueblo from the overlook. "Son of Threatening Rock" is just to the east of the area and I was a ble to get these pictures at sunset.
