The Blue Cave is located on the eastern side of the island of Biševo, not far from Komiža on the island of Vis. It has two apertures, one smaller, artificially deepened, through which a boat with paddles can pass and another aperture, which is much larger that the first one and is under water - through this aperture enters the sunlight, reflecting from the bottom and lighting the cave with a wonderful blue colour, whilst underwater with a magical silver colour, making this a unique attraction.