Why is the Grotto blue?

The bright azure color of the water inside the cave is due to the sunlight which enters the cavern through an underwater opening which is positioned exactly under the cave's mouth. As the light passes through the water, the red reflections are filtered out and only the blue enter the cave itself.



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The island of Capri is riddled with caves and grottos, and the Blue Grotto was not a mystery to locals. Known locally as Gradola, it had been avoided as it was said to be inhabited by monsters or evil spirits. The Blue Grotto is 60 meters long by 25 meters wide. The clear blue waters below the boat are 150 meters deep.

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Sunlight entering through the water that fills most of the entrance gives it an extraordinary blue light, whence its name.

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This hole filters sunlight from outside of the cave and combines with the entrance light to illuminate the sea waters which gives it its glowing effect. The waters natural colour is already a pristine sapphire colour which contrasts against the caves dark, rugged walls and adds to the grottos radiance.

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The Blue Grotto lets you dive down to a depth of 100 feet (30 meters) in crystal clear water all the way down at a water temperature of 72 degrees Fahrenheit (23 degrees Celsius) all year round.

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Can visitors swim in the Blue Grotto Capri? No, visitors can neither enter the cave by swimming nor disembark from their rowboat to swim inside the cave. However, after the cave closes to the public at 5:30 p.m. (when the rowboats and ticket office close), many swimmers enter the cave by sea.

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The Blue Grotto in the Island of Capri is one of the 7 natural wonders of the world! The Blue Grotto in the Island of Capri is one of the 7 natural wonders of the world!

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The Massabielle Grotto is the very place where the apparitions occurred, and within it is the spring that Bernadette discovered. To the right of the Grotto are the Taps where you can drink Lourdes water. Those who wish to can also go to the Sanctuary Baths and perform the water gesture.

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The garden grotto went hand in hand with the idea of mountain caverns or underground caves. Grottoes, associated with cold, the desert, death, initiation- became, in the literary context, images of the interior of the Earth.

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You are not allowed to swim in the Blue Grotto and you cannot jump-off the rwa boat when you are inside the cave. However after the closing time some people get in to swim (and it's considered to be an amazing experience!)

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Plants and animals are visible through the water in the caverns, and divers can see barracudas, jacks, octopus, and morays in the water itself. The caverns also offer a view of Fiflia, an inlet uninhabited by humans, which is home to endemic species, such as the Maltese wall lizard.

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Not to be confused with the Blue Lagoon, which is located in the North West of the archipelago, in the island of Comino, the Blue Grotto is a complex of seven caves found along the southern coast of the island, right across from the little islet of Filfla, and less than a kilometre west of Wied iz-Zurrieq.

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The Blue Cave, also known as the Blue Grotto, is one of the most renowned natural attractions in Croatia and a sight to behold. As you enter through a narrow rocky entrance, the inside of the cave shimmers with an ethereal blue hue, casting a magical glow all around you.

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