One of the places I was determined to visit before we even left England for Kefalonia, was the Melissani Caves. An underground lake with dazzling blue waters highlighted by the sun shining through the skylight overhead, the Melissani Caves were supposedly home to Nymphs in Greek Mythology.
The underground lake never used to have the skylight, but like everywhere else on Kefalonia, it was effected by the huge earthquake in 1953. The ceiling of the cave collapsed into the lake below, and now half of the lake beneath the skylight is just 5ft deep from the rubble, while the rest of the lake is around 35ft deep.