famous melissani lake on kefalonia island, greece.

adventure aerial attraction beach blue boat calm cave caves cefalonia cephalonia crystal day destination drone egremnoi famous geology greece greek hole ionian island islands kefallonia kefalonia lake landmark landscape lefkada limnetic mediterranean melisani melissani mellisani natural nature nymfaio nymphaion pagan picturesque rock sacred sami scenic seacave summer tour tourism travel turquoise underground vacation water