Kopacki Rit Nature Park was set up to protect, celebrate and preserve the area's natural assets. Go for a walk and watch out for birds and other wildlife.
When you've finished up at this nature reserve in Bilje, why not make your way to Osijek Citadel, Dvorac Eugena Savojskog u Bilju, and Archaeological Museum? They're not very far from Kopacki Rit Nature Park and also a favorite with travelers.