Artists preform on a pool suspended above the audience during the Fuerza Bruta dress rehearsal on February 1, 2012 in Tel Aviv, Israel. (Photo by Uriel Sinai/Getty Images)

English singer-songwriter Dua Lipa (R) holds onto a friend in a pool in the last decade of August 2022. (Photo by dualipa/Instagram)

“Danger in the mud” – a crocodile at Mana Pools National Park, Zimbabwe. The grand prize winner. (Photo by Jens Cullmann/World Nature Photography Awards 2022)

People jump into a swimming pool seeking relief from the summer heat, in Sanaa, Yemen on August 7, 2025. (Photo by Khaled Abdullah/Reuters)

The sunrise over the beach huts at Hamworthy Park in Poole, Dorset, United Kingdom on April 28, 2022. (Photo by Rachel Baker/Bournemouth News)

Ben Green, of St. Augustine, flies into the pool on his inflatable alligator to find the hidden lizard at the bottom of the pool in the “Evading Arrest Obstacle Course” during the inaugural Florida Man Games, Saturday, February 24, 2024, at Francis Field in St. Augustine, Fla. (Photo by Corey Perrine/The Florida Times-Union via AP Photo)

Francisca Gomez stands at an entrance to her home, a cave where she has been living for the past 50 years, in the mountains on the outskirts of Chusmuy, Honduras April 21, 2015. The 75-year old widow receives help from neighbors and friends and she makes a little money by selling wood she collects, according to a local newspaper. (Photo by Jorge Cabrera/Reuters)

Jacob's Well is a perennial karstic spring in the Texas Hill Country flowing from the bed of Cypress Creek, located northwest of Wimberley, Texas. The twelve foot (four meter) diameter mouth of the spring serves as a popular swimming spot for the local land owners whose properties adjoin Cypress Creek. From the opening in the creek bed, Jacob's Well cave descends vertically for about thirty feet (ten meters), then continues downward at an angle through a series of silted chambers separated by narrow restrictions, finally reaching a depth of one hundred and twenty feet (forty meters). Until the modern era, the Trinity Aquifer-fed natural artesian spring gushed water from the mouth of the cave, with a measured flow in 1924 of one hundred and seventy gallons per second (six hundred and forty liters per second) discharging six feet (two meters) into the air. The spring is the greatest source of water recharging the Edwards Aquifer.