The Wimberley water hole may top others across the state in pure beauty. (Laura Rice | Texas Standard)The water at Jacob’s Well comes straight out of the Trinity Aquifer. “That’s when we dropped down to zero flow and for four years now we’ve been essentially at zero flow,” Flocke said. Janet Dirmeyer made the trip to Jacob’s Well in the hopes of swimming the watering hole. “My friends are here from Houston, and we wanted to make a day trip and do some swimming, because it’s hot.