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.

A performer wearing a lion mask performs the Ise Daikagura lion dance at the remote village of Yamanawa on February 08, 2021 in Ryuo, Japan. Ise Daikagura is a group of traditional Lion Dance performers who pray in front of farmers houses and businesses for good grain harvests and disease-free lives. (Photo by Buddhika Weerasinghe/Getty Images)

A monkey is being fed by a foreign tourist during the annual Monkey Banquet at Phra Prang Sam Yod ancient temple in Lopburi, some 180km from Bangkok, central Thailand, 24 November 2024. The annual gala has been organized since 1989 by Lopburi's entrepreneur Yongyuth Kitwatananusont, offering all-you-can-eat fruits, vegetables, and desserts for monkeys to honor the long-tailed macaques to attract tourists to visit the town to promote tourism. (Photo by Rungroj Yongrit/EPA)

Fire retardant is dropped on the Fairview Fire burning near Hemet, California, U.S., September 6, 2022. (Photo by David Swanson/Reuters)

A pro-Palestinian demonstrator reacts as she is escorted by security personnel after scuffling with an observer, as protesters in support of Palestinians in Gaza and pro-Israel counter-protesters gather at the encampment on the campus of the University of California Los Angeles (UCLA), amid the ongoing conflict between Israel and the Palestinian Islamist group Hamas, in Los Angeles, California, U.S. April 29, 2024. (Photo by David Swanson/Reuters)

An iguana rests on a man's head during a pet blessing ceremony a day after World Animal Day, at a mall in Quezon City, Metro Manila, Philippines on October 5, 2025. (Photo by Noel Celis/Reuters)

A man dressed in a condom costume walks at Caleta Portales beach, during a summer awareness campaign by the Chilean Corporation for the Prevention of AIDS in Valparaiso city, northwest of Santiago January 9, 2015. (Photo by Rodrigo Garrido/Reuters)

British singer-songwriter Rita Ora performs during Manchester Pride 2024 on August 24, 2024 in Manchester, England. (Photo by Shirlaine Forrest/Getty Images)