The County is now running Jacob’s Well and the surrounding area as a public natural area. The natural area features an underground cave and artesian springs that form a beautiful, but small, pool. They have a guided tour on most Saturdays that discusses the hydrologic features of the well, which forms the headwaters of the gorgeous Cypress Creek that flows through Wimberley. This is a great place to bring the kids to learn about the natural environment in this area and to take a dip in the icy water. However, you need to make sure that the water is flowing at a pretty good clip to really enjoy the place so call before coming out to check on the conditions. We only recently added this to our top picks because now the county limits the number of people allowed at the swimming hole and you have to reserve a spot before going out there. Also, visits are limited to two hours.