| Rtanj | |
|---|---|
 Pyramidal shape of Šiljak - Sokobanja side | |
| Highest point | |
| Elevation | 1,565 m (5,135 ft) |
| Coordinates | 43°46′34″N 21°53′36″E / 43.77611°N 21.89333°E |
| Geography | |
  Rtanj Location in Serbia | |
| Location | Eastern Serbia |
| Parent range | Serbian Carpathians |
Rtanj (Serbian: Ртањ pronounced [r̩̂ːtaɲ], Romanian: Artan) is a mountain situated in eastern Serbia, approximately 200 km southeast of Belgrade, between the towns of Boljevac on north and Sokobanja on the south. It belongs to the Serbian Carpathians. Its highest peak is Šiljak (pronounced [ʃǐːʎak]) (1,565 m), a natural phenomenon of karst terrain.
The north side of the mountain is covered with forests and shrubs, full of autochthonous plant species and plenty of sources of potable water. A hunting ground covers 6368 ha. The most common prey are roe deer and wild boar.