In municipality Bilje, there is a world-renowned natural wetlands Kopački Rit, which is registered as Ramsar and ornithological important area added to the list of internationally significant mud."Ribarski dani" were originally conceived as a local "party" with the aim of bringing together local people to socialize with traditional fish specialties prepared with well-known peppers from diggers. However, each year the interest of getting bigger, and Fishing Days turned into an event that during the two-day weekend in Kopacevo bring thousands of visitors eager to ethno-ambient, smell and taste of fish.