The Blue Grotto is without doubt one of the biggest attractions for visitors to Capri, and anyone who’s experienced the dramatically narrow entrance from the open sea will understand why.
Various earth tremors have caused gradual collapse of the entrance to a height of one metre and a width of two metres, and light can only penetrate through an underwater “window”. This creates the strange tricks of light and reflection in the cave interior (54 metres long, 30 metres high and 15 metres wide) that have made this place famous.
A bright azure colour is reflected through the water, on the rock walls and on the high vaulted ceiling, creating an effect that is truly spellbinding.
One part of the cave is difficult to reach, due to stalactites hanging down from the ceiling. Just outside the cave, there are remains of some kind of Roman structure – suggesting that the Blue Grotto (and Capri) was already a tourist destination two thousand years ago.