I saw some photos of the caves in Kephalonia and there's a lake near one of them, too. I think the cave is called Drograti and the lake is Melissani. I got the impression they were close to each other? Are they?
I would love to visit both - seems like such a natural and beautiful place. I don't want it to be busy when I go - what is a good time of year to visit? Do you have any tips?