view of melissani cave located on the island of kefalonia in greece.

greece kefalonia melissani melissani cave lake doline melisani cefalonia hydrogeology nymphs cavern cenote seacave cephalonia cliff destination excursion geology greek groundwater hole hollow ionian island karst kefallonia kefalonia landmark landscape limnetic limnic mellisani nature nymphaion picturesque rock sami scenic sightseeing tour tourism travel underground vacation view tree