Citadel Sinkhole - Wupatki National Monument, Flagstaff, AZ
Posted by: 
Rayman
N 35° 33.935 W 111° 28.314
12S E 457236 N 3935869
A huge sinkhole located behind an ancient native American pueblo in Wuptaki National Monument near Flagstaff, Arizona.
Waymark Code: WM8J32
Location: Arizona, United States
Date Posted: 04/07/2010
Views: 26
The large circular sink behind the Citadel pueblo was created when acidic rainwater seeped through cracks in the surface of the ground. This rainwater eventually dissolved the limestone below the surface causing anything above it to collapse. The sink appears to be an estimated 600' in diameter.
The sink is located behind a small bluff. A paved trail leads from the parking area around behind the bluff to the sink.