Nominated for World Heritage Site status, Lonjsko Polje in Croatia is a 50 000 hectares stretch of floodplain in the Posavina region, between the Sava River and Mt Moslavačka Gora. Situated along Lonja River, a Sava tributary that gives the park its name, this huge retention basin is famed for the diversity of its flora and fauna. Watch this video portraying the beauty and diversity of the Lonjsko Polje!