Approximately 3 Km . west of Rio Verde is the road to the Media Luna or Half Moon. A southward turn and 10 Km ride take you to this spring where scuba diving, traditionally associated with the sea, becomes a sweet water sport.
The Media Luna is the most important spring in San Luis Potosi from a Scientific tourist, historical and ecological standpoint. Why is this?
Here you can witness the birth of the water that irrigates the Valley of Rio Verde , junipers in the process of fossilization and the curious plunging duck. You can find at the bottom of the spring aquatic plants called nenufar or water lily, of great importance for the conservation of the ecosystem.
The deep blue of the water of the Media Luna allows for visibility of up to 30 m. Temperature fluctuates between 27°C and 30°C throughout the year, which makes diving extremely pleasant. Nature has reserves for the diver a unique spectacle, an underwater cave with a naturally lighted vault.