Große Kulmke

Gropenborn is a river of Lower Saxony, Germany. It rises to over 560 meters above sea level and flows mostly to the northwest, where it is separated by the Gropenbornskopf from the Sieber. After about 2 km (1.2 mi) it discharges an altitude of less than 340 m northeast of the village Sieber in the district of Göttingen into the Sieber. The dominant organism group are caddisflies with 12 species.

The Gropenbornskopf is a northern offshoot of the Aschentalshalbe in the Harz Mountains of central Germany, two kilometres east of Sieber in the district of Göttingen in the state of Lower Saxony. It is 581.2 metres high and was named after the Gropenborn stream that flows downs its western side, and which it initially divides from the River Sieber.

The Breitentalskopf is a hill in the Harz Mountains of central Germany, that rises southeast of Sieber in the district of Göttingen in Lower Saxony. It is 579.1 m high and separates the River Sieber from the Breitental valley (with its stream, the Tiefenbeek), that gave the hill its name. Towards the southeast is the ridge of the Aschentalshalbe.

The Goldenke is a river of Lower Saxony, Germany. It is a 4 km (2.5 mi) long tributary of the Sieber, north of the village of Sieber in the district of Göttingen. It rises at a height of 800 metres in the vicinity of the Hanskühnenburg on the ridge of Auf dem Acker, by the Goldenkerklippe crags. It then flows mainly in a southerly direction and empties into the River Sieber in the village of the same name.

The Aschentalshalbe is a ridge in the Harz Mountains of Germany that is up to 685 m above sea level (NN). It lies south of the village of Sieber in the unincorporated area of Harz in the district of Göttingen in the state of Lower Saxony.

Verlorene Kulmke is a small river of Lower Saxony, Germany. It flows into the Kleine Kulmke west of Sankt Andreasberg.

Schwarze Kulmke is a small river of Lower Saxony, Germany. It flows into the Verlorene Kulmke near Herzberg am Harz.

Kleine Kulmke is river of Lower Saxony, Germany, in the Harz Mountains, a tributary of the Große Kulmke. The Kleine Kulmke rises at a height of 690 m near the Schmierplatz on the Auf dem Acker ridge north-northeast of Sieber in the district of Göttingen and flows initially southwards to its confluence with the Verlorene Kulmke ("Lost Kulmke", 428 m), from which it is separated by the Kleiner Wurzelnberg hill. It then flows in a southwest to south-southwest direction before uniting with the Große Kulmke ("Big Kulmke") after 3.4 km (2.1 mi) at a height of 392 m. The valley of the Kleine Kulmke partly belongs to the Sieber Valley (Siebertal) nature reserve.

The Übelsberg is a 651.3 metre high mountain in the South Harz, which lies southwest of Sieber in the district of Göttingen in Lower Saxony. It sits astride the watershed between the Grade Lutter and the Krumme Lutter rivers. The mountain is linked via a ridge to the Aschentalshalbe in the north and the Mittelberg in the south.

Tiefenbeek (also Breitentalbach) is a small river of Lower Saxony, Germany. It flows into the Sieber in the village Sieber.

The Kleiner Wurzelnberg hill rises to a height of 610 m above NN in the Harz mountains of Germany, 3.7 km northeast of Sieber in the district of Göttingen in Lower Saxony. It forms a rounded summit (Kuppe) on one of the ridges running south of the Acker which acts as the watershed between the Verlorene Kulmke and the Kleine Kulmke. The Großer Wurzelnberg is located 750 metres further east on the other side of the valley of the Kleine Kulmke.

The Adlersberg is a hill in the Harz mountains of central Germany that lies south of Sieber in the district of Göttingen in Lower Saxony. It is 593.2 m high and is situated west of the Aschentalshalbe. It also separates the valley of Breitental ("wide valley") with its river, the Tiefenbeek, from the Langental ("long valley"). To the northwest the Adlersberg transitions to the Kloppstert and the Fissenkenkopf hills. Other nearby peaks are the Pagelsburg 1.2 km south, the Höxterberg 1.6 km southwest and the Großer Knollen 1.9 km southeast.