Großer Knollen

The Kleiner Knollen is a 631 metre high mountain in the southwestern part of the Harz in the German state of Lower Saxony.

The Pagelsburg is a hill in the Harz Mountains of central Germany, which lies south of Sieber in the district of Göttingen in Lower Saxony. It is 545 m above sea level (NN) and lies 1.2 km south of the Adlersberg, 0.9 kilometres east of the Höxterberg and 1.0 kilometre northwest of the Großer Knollen.

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.

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.

The Kloppstert is a hill, roughly 553 metres (1,814 ft) high, in the southwestern Harz in Lower Saxony, Germany. In the topographical map printed in 1978 it can only be made out with difficulty that the third letter is an o and the penultimate one an r. However, a contour line runs over the letter r so that it looks like a p. In the digitalised 1:25,000 topographic map, the hill is wrongly named as the Klappstept.

The Höxterberg 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 584 metres high and lie 0.9 kilometres west of the Pagelsburg, 1.5 kilometres south of the Fissenkenkopf, 1.8 km west of the Großer Knollen and 1 kilometre north of the Mittelecke. The hill is mostly covered by beech woods. Towards the northwest the Höxterberg transitions into the Steile Wand.

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 Fissenkenkopf is a hill in the Harz Mountains of Germany, that rises south of Sieber in the district of Göttingen in Lower Saxony. It is 527 metres high and is the western extension of the Adlersberg and the Kloppstert hills.

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.

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

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.

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.