Beautiful Caves in Spain

This Cave of Wonders is an extraordinary decorated cave. Huge halls and passages decorated with all the speleothem you expect: stalagmites, stalactites, straws and shawls. Some of the chambers have pools and the 70 m high salón del gran lago (hall of the great lake) contains a big subterranean lake. The cave is lighted by inderect light and a sound system allows the playback of music. 
They play the sinfonía del agua by the local musician Luis de Pablo and the suite Gruta de las Maravillas by Don Primitivo Lázaro. The system is located is a small outcrop of lower Cambrian marble, limestone which was