Very close to the town of Fuentes de León is this site that has been declared a Natural Monument and with good reason. It is a karstic set of caves, among which the Cueva del Agua, La Lamparilla, Sima Cochinos, Los Postes, Los Caballos and Cueva Masero stand out, they are between 500 and 540 million years old with great archaeological, geological and tourist value. of the whole area.