Montezuma Well, a detached unit of Montezuma Castle National Monument, is a natural limestone sinkhole near Rimrock, Arizona through which some 1,400,000 US gallons (5,300,000 L) of water flow each day through two underground springs.
It is located 11 miles (18 km) northeast of Montezuma Castle. The well measures in at 368 feet (112 m) across and 55 feet (17 m) deep. The water...