Blue Caves.

These maritime caves are situated at Aspros Vrahos of Krimnos, on the Skinari cape, which is the most northern part of the island, 35 km from the town of Zakynthos.
The biggest of the caves is the famous Blue Grotto which entrance was discovered in 1897.
In the deeper caverns, the visitor has the feeling that everything under the waters -the rocks, the keel of the boat, the body of a swimmer- reflects a bright blue hue.
You can visit the Blue Caves by boat from the nearby port of St Nikolaos.