Losinj Losinj is an island of Croatia that is less busy than the others, but that doesn’t mean there is less to do while visiting the area. If you’re a fan of water activities or sea creatures, a visit to Losinj may be right up your alley. With a number of beaches surrounding the island, you can find time to relax and soak up some sun. If you’re looking to get a little more adventurous, you can go scuba diving off the island. Lucky visitors to the island of Losinj get to see the beautiful dolphins that inhabit the waters in the area.