Every day, 1.5 million gallons (5.7 million liters) of water flow from this 386' (118m) diameter spring. The well, highly carbonated with high arsenic levels, maintains a near constant volume of water and supports a number of endemic species. The overflow from the well has been in use for irrigation since the eighth century. Montezuma Castle National Monument, AZ USA.
Toozigoot National Monument preserves a 2-3 story 110 room pueblo built by the Sinagua around A.D. 1000 and abandoned around A.D. 1400
This alpine lake at 11,000' (3350m) is fed by melt water that has a captivating blue color. Taos, New Mexico USA
