Melissani Cave (Greek: Λιμνοσπήλαιο Μελισσάνης) or Melissani Lake, also Melisani is a cave and cenote located on the island of Kefalonia, northwest of Sami, about 5 km (3.1 mi) Southeast of Agia Effimia, Northeast of Argostoli and Northwest of Poros.
It features a lake surrounded with trees and forest, and is located east of the mountains of Evmorfia and Agia Dynati.
Melissani cave is a typical feature of karst environment in coastal carbonate aquifer.
The bay of Sami has many cenotes, with impressive shafts, that have been inventoried in a GIS Database [see external links].
[1] In Argostoli, the seawater flows into sinkholes, named katavothres, where water mill turns.