6Mallorca – Coves del Drach
Source:marinshotels.com
Dragon caves, in translation, are located in Porto Cristo, Mallorca and consist out of four large caves called the Black Cave, White Cave, Cave of Luis Salvador and the Cave of the French. These caves are a product of water being forced through the entrance from the Mediterranean and have resulted in some spectacular natural formations including stalactites, stalagmites and one of the world’s largest underground lakes called the Martel Lake.