Green rocks plunge suddenly into the deep blue waters.
The capital Argostoli is where the sea pours into spectacular swallow-holes and disappears endlessly into subterranean tunnels forming a rare geological phenomenon. The water reappears at Lake Melissani , an incredible semi-underground lake of clear turquoise and indigo water. Nearby is the Drogorati cave , a large stalagmitic cavern of rare harbour, that has escaped the earthquakes and retains the old style buildings.