POV shot rowboat looking up at the hole of the cave Melissani in Kefalonia

pov shot rowboat looking up hole cave melissani kefalonia point of view action exploration sport turquoise greece boats tourists fisheye fish eye excursion trip sightseeing attraction dripstone stalactite bright sunny explore seacave picturesque beauty destination pond scenic landmark europe tour mediterranean cavern landscape rock natural underground ionian tourism melisani nature water lake blue