Almost uninhabited (just 15 people a year), Bisevo Island is situated opposite the beautiful island of Vis, which lies about 5 kilometres away. I went there during my holiday in Croatia to visit the beautiful Blue Grotto, an underground cave which, in the late morning, lets sunlight in and gives the water a truly unforgettable colour, an almost fluorescent blue. So I would advise anybody travelling to Vis to organise a trip to Bisevo. The port of Komiza has many small stalls where you can book a boat trip.
After visiting the cave, I decided to stay and spend the afternoon on the island. The beaches were certainly nice, but the island offered nothing more than Vis did. So I would advise just visiting the Blue Cave and returning to enjoy the wonders of Vis.