The Blue Grotto is one of the most beautiful caves in the world
This famous sea cave can be found right on the coast of the island of Capri in Italy where it extends for 177 feet. The sun’s light is able to pass through the underwater cavity and illuminates the ocean’s waters, producing a reflection that makes the cave glow blue. With only one entrance, this cave can only be reached by boat and the passengers must lie flat as the oarsman uses a metal chain to pull the boat into the cave. Visitors are also forbidden to swim.