Why is the water so blue in the Grotta Azzurra?

The Blue Grotto is 60 meters long by 25 meters wide. The clear blue waters below the boat are 150 meters deep. The unearthly blue light effect is caused by the refraction of daylight through the above water cave opening and a larger submerged opening.



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But swimming inside the Blue Grotto has been forbidden for a few years now. It isn't recommended to swim inside because of how dangerous it can get. If you're caught swimming in the Blue Grotto, you will receive a fine.

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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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A: Swimming inside the Blue Grotto is not allowed during regular visiting hours. However, some visitors choose to swim into the cave after hours, though doing so can be dangerous and is not recommended.

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You can swim or climb the cliffs in the Green Grotto, which looks like an enormous liquid emerald. Suggest edits to improve what we show. Explore different ways to experience this place. 96% of travelers recommend this experience.

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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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Walking or bus – the walk from Anacapri to the Blue Grotto is around 3.5 kilometres, forming a pleasant way to experience sea views from the coast. Alternatively, you can hop on a bus from Piazza della Pace which takes you close to the entrance of the Blue Grotto.

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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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Spiaggia Marina Grande This is Capri's biggest beach. It's very close to the port, so it attracts the most visitors and can be quite busy. If you're visiting Capri for the first time, chances are you'll come to this beach. If you're traveling with your family, this beach has shallow water areas, so it's safe for kids.

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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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The Weddell Sea has been claimed by scientists to have the clearest waters of any ocean in the world. Described by a historian as “the most wretched and dismal region on earth”, due to the flash freezes that caught Shackleton's ship, its clarity is only belied by the sheer depth of the ocean below.

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