While Croatia is admired and known for the beautiful Adriatic Sea, its rivers and their vegetation and wildlife are just as impressive. You can witness this at Aquatika, the freshwater aquarium in the town of Karlovac. The town is located on the crossroads of four rivers so there is hardly a better place to explore the aquatic world. The aquarium showcases a division of river into the upper stream, middle flow and lower stream, but also standing waters like ponds and swamps. Meet endemic species of fish, invasive species, and learn about the making of tufa - the wonderful stuff that waterfalls are made of.