The hole is perfectly circular in shape, over 300 meters (1000 ft) across, 3140 feet circumference and 125 meters (410 ft) deep. It was formed as a limestone cave system during the last glacial period when the sea level was 400 to 500 feet below present time and was dry land.
Jacob's Well is perhaps the longest underwater cave in Texas and an artesian spring that delivers several thousand gallons of water per minute. It acts as the headwaters to Cypress Creek that flows through Wimberley into Blue hole and then to the Blanco River.
Definitely a bucket list trip! Hubby and I went at the end of July 2018 as part of a day trip from Turneffe atoll to the Blue Hole, Half Moon Caye, and aquarium. We enjoyed the snorkeling experience and saw neat coral and fish.
Divers found debris and human corpses during an expedition to the Great Blue Hole off the coast of Belize. Divers reached the bottom of Belize's iconic Great Blue Hole – only to discover that the pristine natural wonder isn't so pristine after all and is actually full of disturbing debris.