The sinks of Argostoli have been considered another "mystery" by many of Kefalonia. At the edge of the Argostoli Peninsula the sea penetrates the land and flows into sinkholes. The phenomenon has long troubled scientists. In 1963, geologists Viktor Maurin and Josef Zötl of the University of Graz threw 160 kilograms of paint into one of the sinks. Two weeks later traces of color were found in springs on the other side of the island, 14 km away, as well as in the Melissani lake cave.The sinks are nothing more than karstic gaps through which the waters of the rivers that flow into the polga are drained. The strange thing is that the sinks of Argostoli are a system of crevices that are located at a lower level than the sea surface and constantly receive its waters with momentum, a kind of coastal abyss with a constant inflow of sea water. Many scientists claim that fresh water descends underground from Ainos, it is estimated that 1,000 cubic meters per 24 hours are lost.

Short tour by rowing boat Melissani lake is a wonderful underground lake with sublime stalactites, where some kind of worship of God Pan took place in historical times. When illuminated by the sun’s rays, sublime colors are reflected on the lake water.