The Blue Grotto or Blue Cave (Croatian: Modra špilja), is a water-logged 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 Adriatic. It is situated in the central Dalmatian archipelago, 5 kilometers 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. Depending on the season, the ideal moment to visit the cave is between 10 a.m. and 12 p.m. At this time of day the sunlight reflects through the water coming from the white floor of the cave and bathes the grotto in aquamarine light, while objects in the water appear to be silver.