One of the world's most important sea-caves is located in Lefkada - particularly in the neighboring Meganissi - and is named after the submarine Papanikolis, which used the Cave as its base during the Second World War and is only reached by sea. Total area of 3.800 sq.m. it is 120 m long, 60 m wide and 30 m deep, a beautiful natural decoration with impressive stalactites. In case of bad weather offers "shelter" in sailing boats and boats.