In summer, half of Karlovac decamps to Foginovo, a stretch of grassy bank and clean swimming on the Korana, ten minutes' walk south of the old town. The river is wide and shallow here, with a rope-rigged ferry to the far bank where the kiosks sell beer, čevapi and ice cream.
It is the unforced social centre of the city from June to September and a much more enjoyable swim than anything you would find in the sea further west.