The church of the Virgin Mary Laguvarda is located in the village of Markopoulo and was built on the ruins of an old monastery destroyed by the Turks.
It is believed in 1705, the monastery was attacked by pirates, the scared nuns prayed to Madonna of being turned into serpents to escape the cruelty of their captors.
The prayers were answered and the nuns were turned into snakes that did escape the pirates with fear.
Since then, every year on the day of August the nuns-snakes return to the monastery to bring good luck and prosperity to the village.
This legend explains why, every 15th August, harmless little snakes appear inside and around the church and at end of the day they disappear. This is another of the mysteries that characterize the island of Kefalonia.