Cova d'en Xeroni

Lonely Planet review

On the main road east of Sant Ferran just beyond Km 6, turn right for the Cova d'en Xeroni. This underground cavern rich in stalactites and stalagmites was revealed in 1975 when the landowner was digging a well. It's a one-man band, so treat opening times with a grain of salt (the most likely times are 1pm and 6pm).