Luckenwalde (German: [ˌlʊkn̩ˈvaldə] ; Upper and Lower Sorbian: Łukowc, Upper Sorbian: [ˈwukɔfts], Lower Sorbian: [ˈwukɔwts]) is the capital of the Teltow-Fläming district in the German state of Brandenburg. It is situated on the Nuthe river north of the Fläming Heath, at the eastern rim of the Nuthe-Nieplitz Nature Park, about 50 km (31 mi) south of Berlin. The town area includes the villages of Frankenfelde and Kolzenburg.