Blue Hole

Santa Rosa, NM ---- Cribbing yet once again from Wikipedia: "The Blue Hole of Santa Rosa is a circular, bell-shaped pool east of Santa Rosa, New Mexico that is one of the most popular dive destinations in the US for SCUBA diving and training. The Blue Hole is an artesian well that was once used as a fish hatchery. It is a clear blue body of water with a constant 62 °F (17 °C) temperature and constant inflow of 3,000 US gallons per minute (11 m3/min; 2,500 imp gal/min). While the surface is only 80 feet (24 m) in diameter, it expands to a diameter of 130 feet (40 m) at the bottom." This photo is of the orange flippers of a diver descending.