The 7C National Road, named Transfagarasan, links Muntenia with Transylvania, crossing the Fagaras Mountains, the highest in Romania, which are part of the Southern Carpathians. It is a paved road, reaching near the tunnel near Balea Lake at the altitude of 2042 m. Thus, Transfăgărăşanul is placed on the second place as altitude in the alpine ranking in Romania, after the Transalpina from Parâng Mountains, which climb up to 2145 m.The road starts from the commune of Bascov near Pitesti and climbs the valley of the Argeş River, passing through the town of Curtea de Arges. To the north of the city, the road passes by the Vidraru Hydro Power Station, located in the Cetatuia Massif. From here, near Poenari, the road climbs through serpentines and viaducts, passing through the three shorter tunnels, reaching the Vidraru Dam, which, with its 307m, connects the Pleasa and Vidraru Mountains. Passing the dam, the road continues on the left side of Lake Vidraru to its tail. Further on, the road starts climbing along the valley of the Capra River until it reaches the alpine hole near Capra Chalet; after a series of serpentines, passing through the Strait of the Capra, they reach the southern entrance of the Capra-Balea tunnel, which passes under the ridge of the Fagaras Mountains between the peaks of Iezer Capra and Paltinul. The tunnel is the longest tunnel in Romania, with a length of 887 m, with a height of 4.4 m, a width of 6 m and a sidewalk with a width of 1 m, being electrically and naturally ventilated.
