Blue Grotto is a magical sea cave that rests on the coast of the island of Capri in southern Italy. This truly beautiful destination is famously known for its vibrant blue waters. When the sunlight beams through the underwater cavity and shines through the seawater, it creates a blue reflection that illuminates the cavern and creates a truly enchanting oasis. This beautiful natural sea cave is 60 metres long and 25 metres wide. It can only be accessed via a rowboat.