The Blue Grotto (Grotta Azzurra) is cave on the coast of the island of Capri, Italy. The blue reflection the grotto is known for comes from the sunlight, passing through an underwater cavity and shining through the seawater.
Notable News
Sept. 28, 2009 -- A number of ancient Roman statues might lie beneath the turquoise waters of the Blue Grotto on the island of Capri in southern Italy, according to an underwater survey of the sea cave. Dating to the 1st century A.D., the cave was used as a swimming pool by the Emperor Tiberius (42 B.C. - 37 A.D.), and the statues are probably depictions of sea gods. - Discovery News
