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.

Penitents wearing masks, known locally as “Morions” take a selfie during the start of Holy Week celebrations in Mogpog, Marinduque in central Philippines March 21, 2016. The Moriones is an annual festival held on Holy Week on the island of Marinduque, Philippines. The “Moriones” are men and women in costumes and masks replicating the garb of biblical Roman soldiers as interpreted by local folks. (Photo by Erik De Castro/Reuters)

A Naga sadhu, or naked Hindu holy man, performs a ritual inside his tent during Kumbh Mela, or Pitcher festival, at Trimbakeshwar, India, Friday, August 28, 2015. Hindus believe taking a dip in the waters of a holy river during the festival will cleanse them of their sins. The festival is held four times every 12 years. (Photo by Rajanish Kakade/AP Photo)

Children play in water to beat the heat during the Muslim holy month of Ramadan amid lockdown of the Sindh province due to the ongoing coronavirus COVID-19 disease pandemic in Karachi, Pakistan, 28 April 2020. Muslims around the world celebrate the holy month of Ramadan, by praying during the night time and abstaining from eating, drinking, and sexual acts during the period between sunrise and sunset. Ramadan is the ninth month in the Islamic calendar and it is believed that the revelation of the first verse in Koran was during its last 10 nights. (Photo by Shahzaib Akber/EPA/EFE)

Students of Rabindrabharati University apply colour dust or Gulal on each other during a celebration the festival of colour Holi in Kolkata, Eastern India, 23 March 2024. Holi, also known as the Festival of Colors, is an ancient Hindu festival symbolizing the victory of good over evil and marking the arrival of spring. It is observed with joyful gatherings during which revelers cover each other in colored powders. (Photo by Piyal Adhikary/EPA/EFE)

A priest sprinkles holy water at a cat at a drive-through pet blessing, ahead of World Animal Day, at a mall in Quezon City, Metro Manila, Philippines on October 2, 2022. (Photo by Lisa Marie David/Reuters)

People smeared with colors play Holi at Nandagram temple in Nandgoan village, 115 kilometers (70 miles) south of New Delhi, India, Wednesday, March 1, 2023. (Photo by Deepanshu Aggarwal/AP Photo)

Palestinians perform to amuse people with a wire which ignites sparks during the Islamic holy fasting month of Ramadan, on April 03, 2023 in Gaza City, Gaza. (Photo by Mustafa Hassona/Anadolu Agency via Getty Images)