Those who have an interest in all things nautical will want to visit Ugrinci Harbor. It's a lovely place to go for a wander along the water's edge and admire the boats.
If you're staying a while in Kraj, Ugrinci Harbor is a great place to start your exploring. This place for ships to anchor is one of many attractions worth checking out here. Otocici Komornik, Marina Kornati, and Island of Love are also waiting to be explored close by.