2. Melissani Cave, Greece

According to Greek legend, Melissani is known to be the Nymph’s cave. It has a striking looking lake in addition to lush trees and a thriving forest. Nestled smack in the middle of the Eymorfia and Agia Dynati mountains, the place plays host to plenty of tourists. While plants grow at the entrance of the cave, the base of the lake is filled with intriguing, brown stones.