The caves of Drach are four great caves that are located in the island of Majorca, Balearic Islands, Spain. They are in the municipality of Manacor, near the locality of Porto Cristo. The caves extend to a depth of 25 m, reaching 2.4 km in length. The four caves, called Black Cave, White Cave, Cave of Luis Salvador, and Cave of the French, are connected to each other. The caves have formed by water being forced through the entrance from the Mediterranean Sea, and some researchers think the formation may date back to Miocene. There is an underground lake situated in the caves called Martel Lake, which is about 1150 m in length and 30 m in width. In Porto Cristo there are two caves: Cuevas dels Hams and Cuevas del Drach. To visit Cuevas dels Hams, turn right before entering Porto Cristo on the road Manacor-Porto Cristo. To visit Cuevas del Drach, enter into Porto Cristo and follow the road signs marking "CUEVAS DEL DRACH" For more information, enter in www.cuevasdeldrach.com