Balmorhea

Balmorhea SP https://tpwd.texas.gov/state-parks/balmorhea/map https://en.wikipedia.org/wiki/Balmorhea_State_Park Balmorhea State Park is located on the San Solomon Springs in Reeves County, Texas. The park is open year-round, and visitation is capped at 900 people per day. The main feature of the park is the 1.3-acre (0.53 ha), 3.5-million-US-gallon (13,000 m3) freshwater pool built around the springs. It is the world’s largest spring-fed swimming pool. The spring has a constant flow of 22 to 28 million US gallons (110,000 m3) a day so no chlorination is required. The water temperature ranges from 72 to 76 °F (22 to 24 °C) and up to 30 feet (9.1 m) deep. The pool bottom is flat in the more shallow areas and has a more natural rock bottom in the deeper areas. The pool is used for both swimming, snorkeling and scuba diving.