Jacob's Well, Texas Hill Country, Wimberley, Texas

Due to development in the area, the level of the Trinity Aquifer has dropped affecting the flow of water through Jacob's Well. In the modern era, what remains visible of the spring is a faint ripple on the surface of Cypress Creek. The spring ceased flowing for the first time in recorded history in 2000, again ceasing to flow in 2008. This resulted in now ongoing measures to address local water conservation and quality. Hays County purchased fifty acres (202000 square meters) of land around Jacob's Well in 2010, in an attempt to protect the spring from development. An additional thirty-one acres was transferred to the county from the neighboring Jacob’s Well Natural Area (administered by the Wimberley Valley Watershed Association (WVWA)), the new, eighty-acre (323000 square meter) named the Westridge Tract. With the general decrease in water flow through the cave system, divers were for the first time able to descend directly to the first chamber.
Jacob's Well is considered a dangerous underwater cave for novice or non-cave trained SCUBA divers, with at least eight divers having died in the system. At the present, four chambers have been explored, the last of which ends in a too narrow restriction for divers to continue.