Blue Grotto

Blue Grotto (Biševo)

The Blue Grotto or Blue Cave, is a flooded sea cave located in a small bay called Balun, on the east side of the island of Biševo and about 4.5 nautical miles (8.3 km) from Komiža, in the Croatian Adriatic. It is situated in the central Dalmatian archipelago, 5 km south-west of the island of Vis. The grotto is one of the best known natural beauty spots on the Adriatic and a popular show cave because of the glowing blue light that appears at certain times of day.

Blue Grotto (Capri)

The Blue Grotto is a sea cave on the coast of the island of Capri, southern Italy. Sunlight shining through an underwater cavity is reflected back upward through the seawater below the cavern, giving the water a blue glow that illuminates the cavern. The cave extends some 50 metres (160 ft) into the cliff at the surface, and is approximately 150 metres (490 ft) deep, with a sandy bottom.

Grotto

A grotto or grot is a natural or artificial cave or covered recess. Naturally occurring grottoes are typically small coastal caves associated with bodies of water and may be partially or fully submerged at high tide. Artificial grottoes have also been constructed as garden features, particularly in landscape design from the Renaissance onward. Well‑known natural examples include the Grotta Azzurra on Capri and the grotto at Tiberius’ Villa Jovis in the Bay of Naples.

Blue

Blue is one of the three primary colours in the RGB (additive) colour model, as well as in the RYB colour model. It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called the Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.

blue

Adjective

1. Of a blue hue.
2. Depressed, melancholic, sad.

Noun

1. The colour of the clear sky or the deep sea; the colour midway between green and violet in the visible spectrum and one of the primary additive colours.
2. Anything coloured blue, especially to distinguish it from similar objects differing only in colour.

grotto

Noun

1. A small cave.
2. An artificial cavern-like retreat.