Jacob's Well in Texas Hill Country is a perennial karstic spring located on the bed of Cypress Creek in Wimberley. The mouth of the well is four meters in diameter through which thousands of gallons of water surges up per minute feeding Cypress Creek that flows through Wimberley, sustaining Blue Hole and the Blanco River, recharging the Edwards Aquifer, and finally replenishing estuaries in the Gulf of Mexico.
The well was first discovered in the 1850s when a couple of early settlers followed Cypress Creek to its source. They described the crevice in the creek bed which was overflowing with an abundance of clear, cool water as "like unto a well in Bible times." Since then, the location has been a beloved swimming hole for generations, a gathering place for Native Americans and early settlers, and a rich habitat for aquatic species. It is also a popular diving spot for thrill seekers despite the fact that at least eight divers have lost their lives here over the years.