There is

Ada Ciganlija (Serbian Cyrillic: Ада Циганлија; pronounced [ˈǎːda tsiˈɡǎnlija]), colloquially shortened to Ada, is a river island that has artificially been turned into a peninsula, located in the Sava River's course through central Belgrade, the capital of Serbia. The name can also refer to the adjoining artificial Lake Sava and its beach.

Ada Međica (Serbian Cyrillic: Ада Међица) is an island and an urban neighborhood of Belgrade, the capital of Serbia. It is located in Belgrade's municipality of Novi Beograd. Ada Međica is an ovally shaped river island in the Sava river, a 1.5 km (0.93 mi) long and 200 m (660 ft) wide, covering an area of 13.4 ha (33 acres).