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Hidden away on the islet of Biševo (5 nautical miles southwest of Komiža), the Blue Cave is 78 feet long and 39 feet wide. Sunlight enters through the water, reflects off the seabed, and casts the interior in a fantastic shade of blue. Throughout the summer, local fishermen and agencies take tourists (some coming from Split and Hvar by speedboat) into the caverns. It can be a long wait in summer when there's a line of small boats waiting to enter the cave. Ask at the marina or the tourist information office to see who is offering trips. Sometimes, small boat operators will wait at the entrance of the cave for visitors arriving on sailboat or yacht (which are too large to enter the cave).