Sonnenberg (Harz)

The Sankt Andreasberg Observatory, also called Harz Observatory, is a project of the charitable society Sternwarte Sankt Andreasberg e. V., which translates into Sankt Andreasberg Observatory registered society. It was opened in August 2014 and is supposed to become the first completely barrier free Observatory in Germany. The society's expressive goal is to make the sky accessible to all people, whether they are disabled or not. Celestial observation, lectures and Workshops convey general astronomical knowledge to visitors.

The Oderteich is an historic reservoir about seven kilometres northeast of Sankt Andreasberg in the Upper Harz in central Germany. It was built by miners from St. Andreasberg in the years 1715 to 1722 and, today, is an important component of the water supply network known as the Upper Harz Water Regale (Oberharzer Wasserregal). Moreover, for 170 years, from the time it was completed to the end of the 19th century, the Oderteich had the largest dam in Germany. The dam lies at a height of 725 m above NN by the B 242 federal highway, about a kilometre west of its intersection with the B 4.

At 893 metres (2,930 feet) above sea level, the Rehberg in the Harz mountains is the fourth highest mountain in the German state of Lower Saxony, and the fifth-highest in the Harz.

The Kuppe is a mountain in the Harz that lies north of Sankt Andreasberg in the district of Goslar in the German state of Lower Saxony. It is 729.1 metres high and is connected to the Jordanshöhe in the west.

At 927 m above sea level (NN), the Bruchberg in the Upper Harz is the second highest mountain in Lower Saxony and the third highest in the Harz mountains in North Germany. It lies between Altenau and Torfhaus in the middle of the Harz National Park. The Bruchberg is more like a plateau and has no real summit. This plateau is partly covered with trees, but on the sunny southern slopes the trees have largely died as a result of bark beetle infestation (see photograph below). Following this insect destruction, a new natural forest, rich in its variety of species, is now growing in the heart of the Harz National Park.

The Jordanshöhe is a mountain, roughly 723 m above sea level (NHN), in the Harz in central Germany. It lies north of the town of Sankt Andreasberg in the district of Goslar in Lower Saxony. To the west is the Kuppe. On the mountain there is the Jordanshöhe youth hostel and the Jordanshöhe nature trail (Gesteinskundlichen Lehrpfad Jordanshöhe).

The Samson Pit or Samson Mine (German: Grube Samson) is an historic silver mine in Sankt Andreasberg in the Upper Harz region of central Germany.The pit has one of the oldest man engines in the world still working and it can be seen in operation during guided tours. The man engine, installed in the Samson Pit in 1837, used to be driven by the water power of the Rehberg Ditch (Rehberger Graben). The start of this ditch is the Oderteich reservoir, which is part of the Upper Harz Water Regale. The large water wheel (with a 12 m diameter), which drove the man engine until 1922, is only powered by water today for demonstration purposes; an electric motor has taken over the operation of the man engine.

The Roter Bär Pit (German: Grube Roter Bär) in Sankt Andreasberg in the Upper Harz is an iron ore mine that was worked from about 1800 until the 1860s. Today it is operated as a show mine under the name of Roter Bär Pit Educational Mine by the Sankt Andreasberg Society for History and Archaeology (Sankt Andreasberger Verein für Geschichte und Altertumskunde). The name Roter Bär means "Red Bear". In line with historical practice the funds required to restore the historic mine were raised through the formation of a mining trades union and issue of share certificates.

Sankt Andreasberg is a former town in the district of Goslar, in Lower Saxony, Germany. Since 1 November 2011, it is part of the town Braunlage. It is situated in the Harz, approximately 7 km west of Braunlage proper, and 20 km east of Osterode am Harz.

The Dyke Ditch (German: Dammgraben) is the longest artificial ditch in the Upper Harz in central Germany. Its purpose was to collect surface runoff for the operation of the Upper Harz mining industry from precipitation-heavy regions a long way away (particularly from the Bruchberg and parts of the Brocken massif). It was laid in 1732 and continually extended eastwards until 1827. Its original length was about 25 km; this was successively shortened by water tunnels between 1820 and 1861 to around 19 km. It is a central component of the Upper Harz Water Regale. Its takes its name from the Sperberhai Dyke which is, in fact, an embankment on top of which the Dyke Ditch runs in an aqueduct in order to cross a depression.

The Grünhirscher Stollen (also Grünhirschler Stollen or Grüne Hirschler Stollen, German: Green Stag's Adit) is an adit (German: Wasserlösungsstollen) for water drainage in Sankt Andreasberg, in the Harz mountains. It was created during mining in the Upper Harz and named after the valley Grüner Hirsch (German: Green Stag) between the mountains Galgenberg and Glockenberg. It leads from the Samson Pit to the south-west of the Galgenberg.The first 7.1 km of the 10.2 km adit is part of the Upper Harz Water Regale and has been declared UNESCO World Heritage Site.

Radau is a river of Lower Saxony, Germany. It is right tributary of the Oker. It rises in the Harz range, leaves the mountains at Bad Harzburg, and discharges into the Oker near Vienenburg.