Blue Cave Travel Guide

Located on the small island of Biševo, near Vis, the Blue Cave is one of Croatia's most spectacular natural wonders. Known locally as Modra Špilja, the cave's unique beauty stems from a natural phenomenon: sunlight penetrates through an underwater opening and reflects off the white limestone seafloor, bathing the cave in an otherworldly blue light. This creates a breathtaking, silvery-blue illumination that has captivated visitors since the cave was opened to the public in 1884.The cave itself is approximately 24 meters long, 10 to 12 meters deep, and up to 15 meters high, with a narrow entrance only 2.5 meters wide and 1.5 meters high. This small entrance requires visitors to transfer to smaller boats to enter. The best time to witness the full effect of the blue light is on a sunny day between 11 AM and 12 PM, when the sun's rays are at their strongest. However, the cave maintains its magic throughout the day, with the shade of blue shifting depending on the sunlight.Biševo island itself is a small, remote island with a population of only around 12 permanent residents, most of whom are involved in tourism related to the Blue Cave. Besides the Blue Cave, Biševo boasts other natural attractions, including sandy bays and other caves, as well as local products like Biševo Plavac wine.