Jacob's Well, Natural spring in Wimberley, Texas, United States.

Jacob's Well is a karst spring in Wimberley, Hays County, Texas, with an opening in the limestone surface roughly 12 feet wide. Water flows up from a vertical cave system that extends around 137 feet down before opening into horizontal passages.

Settlers in the 1850s used the spring water to run a sawmill, which formed one of the first structures in the community. This early use of the water helped establish Wimberley as a permanent settlement in the Texas Hill Country.

European settlers named the spring after the biblical well in Sychar when they discovered the clear water flowing from the limestone. Today visitors come mainly to swim and enjoy the natural pool, which has served as a gathering spot for cooling off across generations.

Between May and September, you need to book an online reservation to swim, as visitor numbers are limited. Plan to book several days ahead, especially on weekends and during summer months.

The cave splits into two conduits: the main passage runs about 4,500 feet from the surface to a maximum depth of 137 feet, while a secondary branch extends roughly 1,000 feet from where it diverges. Nine divers died here between 1964 and 1984, eight men and one woman.