The Zasavica is a bog in the region of Mačva, west central Serbia. It is a major wildlife refuge and one of the last authentically preserved wetlands in Serbia. In the 2000s it became a popular attraction with the successful reintroduction of beavers, which had become extinct on the same land areas 100 years before.

Sremska Mitrovica is a city in Serbia. It is situated on the left bank of the Sava river. As of 2022, the city has a total population of 40,144 inhabitants, while its administrative area has a population of 72,580 inhabitants.