Jacob’s Well is a large perennial spring (4 meters in diamter) it flows out of the most extensive underwater cave system in Texas, in the United States. Jacob’s Well is actually the fountainhead of Cypress Creek and it is located just a few miles north of Wimberley in Texas Hill Country. the “well” is about 10 meters in depth,at the bottom there is a series of chambers which scuba divers tend to visit since the decrease in water flow, Jacob’s Well hass very dangerous underwater caves – at least eight divers were killed while exploring the bottom chambers.
For more information visit Wikipedia - Jacob’s Well, Texas
Google map of Jacob’s Well, Texas
Next photo by PaddyMurphy who took it from the Diver’s point of view