The “Well,” as it is commonly called, is a separate unit of this National Monument. It is an area rich in cultural and natural history.

Geologists suggest that the Well is a sinkhole formed by water percolating through limestone. Warm, underground springs supply a daily flow of 1½ million gallons, and support a pond life devoid of fish! Nearby are the fossilized remains of irrigation ditches used to carry this water to prehistoric farmlands. Along the Well’s rim are the ruins of these farmers’ homes. Today, the water from Montezuma Well irrigates a nicely shaded picnic area abundant in bird life.