Copacabana
Who says you need the Adriatic to have water fun in Croatia? On the north side of the Drava River, you'll find Copacabana, a complex of outdoor swimming pools, waterslides, mini-golf, and bocce courts. There is also a free sandy beach nearby where you can swim in the river, with a couple of bars for refreshments. It's a great place for the whole family to spend a sunny afternoon or watch the sun set.