Erroneously named after the Aztec emperor who ruled in the early 16th century, but had no connection to the well, this is a perfect stop after visiting nearby Montezuma Castle. The natural sinkhole produces about 1.5 million gallons of water a day, an unlikely oasis in the middle of the otherwise arid desert. It was important to the civilizations who lived in the region between the 700s and 1400s, providing a continuous source of water and irrigation. To get there, take Arizona Veteran's Hwy to E. Beaver Creek Rd. and follow the road until you reach your destination (4.2 miles). It's open every day from 8 AM to 4:45 PM.