In the village Kastria of Achaia, 60km from Tripoli (tunnel at Artemission) and 9 Km from Kleitoria, lies the famous "Cave of the Lakes". It is a rare creation of Nature.
Apart from its labyrinth of corridors, its mysterious galleries and its strange stalactite formations, the "Cave of the Lakes" has something exclusively unique that does not exist in other well known caves.
Inside the cave there is a string of cascading lakes forming three different levels that establish its uniqueness in the world.
The cave is an old subterranean river whose explored length is 1980 meters. In winter when the snow melts, the cave is transformed into a subterranean river with natural waterfalls.
In the summer months, part of the cave dries up revealing a lace-work of stone-basins and dams of up to 4 m. in height. The rest of the cave retains water permanently throughout the year in 13 picturesque lakes. The developed part of the cave is currently 500 meters long.