the west. This means inter alia that the roads radiating outwards east of the old main road axis (today Erbische Straße and Burgstraße running from the former Erbisch Gate (Erbischer Tor) on Postplatz to Freudenstein Castle), some of which run as far as the opposite side of the Münzbach valley, are very steep. The area located east of the main road axis is called Unterstadt ("Lower Town"), with its lower market or Untermarkt. The western area is the Oberstadt ("Upper Town") where the Obermarkt or "Upper Market" is situated. The town centre is surrounded by a green belt running along the old town wall. In the west, this belt, in which the ponds of the Kreuzteichen are set, broadens out into an area like a park. Just north of the town centre, is Freudenstein Castle as well as the remnants of the town wall with several wall towers and Schlüsselteich pond in front of them. The remains of the wall run eastwards, in sections, to the Donats Tower. This area is dominated by the historic moat. The southern boundary of the old town is characterised in places by buildings from the Gründerzeit period. The B 101 federal road, here called Wallstraße, flanks the west of the town centre, the B 173, as Schillerstraße and Hornstraße, bounds it to the south. Freiberg's north is dominated by the campus of its University of Mining and Technology. The main part of the campus on either side of Leipziger Straße (as the B 101 road, the most important transport link in this district) emerged in the 1950s and 1960s. Furthermore, the districts of Lossnitz, Lößnitz and Kleinwaltersdorf are found here, extending almost out to the boundary of the borough. Between Kleinwaltersdorf and Lößnitz is the Nonnenwald wood, and east of Leipziger Straße is a trading estate. Surrounding area In the area around Freiberg there are both industrial estates as well as agricultural and recreational areas. Smelting and metalworking firms are based at Muldenhütten and Halsbrücke and paper manufacturers at Weißenborn and Großschirma. Northeast of the town is the recreational area of the Tharandt Forest The town of Großschirma lies north of Freiberg on the B 101 federal road. To the northeast the municipality of Halsbrücke borders on the territory of Freiberg's borough and, to the east, is the municipality of Bobritzsch-Hilbersdorf. The municipality of Weißenborn to the southeast belongs to the Verwaltungsgemeinschaft of Lichtenberg/Erzgebirge.