Suva planina Mountain belongs to the Carpatho–Balkan Mountains that stretch of the river Danube in the north to ZAPLANJSKA–Lužička valley and mountains Ruj in the south. In the east, going from the Bulgarian border and west to mountain of Morava large rocks. A diverse geological structure due to which are rich in various ores and minerals.
Trem is the highest peak Suva Planina mountain, 1810 meters high and stands opposite Sokolov stone that is 1361 meters high. Both the top of the right artwork nature incurred in the distant past the Earth. On the north side cut off the sharp edges of the stone while the southern side covered with rare vegetation, grass and low bushes of juniper with partial rocky parts. Every year on St. Vitus Day (28 June) mountaineers Niche traditionally organized night climb to the highest peak of the mountain Suva, Trem.
About two hours it is necessary to Devojački stone (grave) arrives at the top of Trem and overcome the height difference of about 500 meters above sea level. The view is impressive, the view extends to the massif of Stara Planina with high Midžor, the chain slightly lower the Svrljig Mountains, adjacent to Sokolov stone behind which looms valley and the city of Niš. Also on the northeastern side aspect extends to Babičko mountain beneath which extends Zaplanje, while behind these slopes see Leskovac and Vlasotince east of it, means almost the entire southeastern Serbia on the palm.