Kefalonia has to show unique geological phenomena, such as the sinks, at a distance of 2,5 km from Argostoli, where the water flows to the sea shore and it disappears underground in the sinks covering a distance of 17 km before it recurs in the sea again, and the Caves of Melissani , with 3.5 kilometers in length and 13 m depth, and these of Drogarati. Sights around the city are the stone bridge of Drapanos, known as the bridge Devosetou, the square Metaxa, the Lighthouse of St. Theodore, an elegant and unassuming building surrounded by a colonnade, the ancient city of Krani, the Cave of St. Gerasimos, the Korgialeneia Library, and the Archaeological and Historical and Folklore Museum. Major attractions are also the monastery of Saint Andrew with the Byzantine-Ecclesiastical Museum in Peratata,the Mycenaean tombs in Mazarakata, the Castle of St. George in Trafliata, the monastery of Panagia of Sissiwn in Vlahata, the Naval and Environmental Museum in Fiskardo, and the monastery of Panagia. Starting from Lixouri it is worth a visit to the Public Library and the Museum in the mansion of Iakovaion-Typaldos, at Moni Kipouraion and the Mycenean cemetery in the area of Kontogenadas