Our main goal for the day was to drive up the west coast of Mani to see the Diros caves. The caves are unusual in that it’s half-filled with water, so you go through most of it by boat. The roof of the cave is very low at times, and we all had to bow our heads down quite far, which was quite loudly told us by our guide who steered the boat for us. It was a spectacular view inside though... you are viewing thousands of years of water doing its work through the lime stone cave system and it leaves you pretty awe struck with its natural beauty... it is like a different world or planet!
The underground river is moving through the limestone that makes up the cave system. It said in my guide book that cave divers have attempted to explore the cave and it is believed that the river system goes as far north as Sparta. Human remnants from the Neolithic times have been discovered in the caves. Which is to be expected because it is one of the only sources of fresh water in the area.