The Fuente de Piedra lagoon, at 1,400 hectares, is the largest in Andalucia. It is situated in Malaga province near the town of Antequerra. The lagoon is home to the largest colony of flamingos in the Iberian Peninsula. It is fed by underground springs and two streams, the Santillan and El Humilladero. Due to the saline nature of the strata beneath the lagoon, the water is very salty. During the summer a salt crust forms on the surface of the water. The salt has been exploited since Roman times, and the ancient dykes and walls are essential for the breeding flamingos and other aquatic birds such as the gull-billed tern, slender-billed gull, the white stork and the shoveler. Sandpipers are common visitors during the winter.
The José Antonio Valverde visitor centre is located on a small hill known as the Cerro del Palo, overlooking the Fuente de Piedra lagoon offering the chance to enjoy spectacular views across the lagoon.