This fanciful name was given to this structure because it's built on a freestanding boulder. At one time, a log spanned the gap between the house and the canyon wall. This provided access and stability. When the log eventually fell, a good portion of the house went with it.
I've been wanting to visit Hovenweep National Monument for a few years. It has the best quality workmanship of any ruins I've seen to date. The monument is spread out over several sites covering a fairly large area. Up to 2,500 people may have inhabited the area in the 1200s A.D. Many of the structures were built between 1230 and 1270.
By 1300 A.D., the people were gone. No one knows for sure why they left. Probably, a prolonged drought forced them to move to central Arizona and New Mexico.
Hovenweep National Monument
Utah-Colorado border, USA
Part of the Great American West series.