If museums are on your list of things to see in Vukovar, then you might want to head to Vučedol Culture Museum. If you want to see more of the museums in Vukovar, Vukovar War Memorial isn't far either.
You might want to get your camera out and head to Castle Odescalchi-Museum of Ilok— just one of the landmarks located 3.2 mi (5.2 km) from central Ilok.