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2. Blue Grotto, Capri

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The beautiful Blue Grotto is a natural sea cave off the Italian island of Capri. Sunlight seeps into the 60 feet deep cave through an underwater cavity, giving it that enchanting glow. While swimming is off-limits, you can still explore the Blue Grotto by hopping on a tour where a rowing boat takes you inside. Whether or not you believe the local legends about its past (some say it was the swimming pool of Emperor Tiberius, others an abode to spirits and demons), you’re sure to be bewitched.