Dyke Ditch

The Dehnenkopf in the Harz Mountains of central Germany is a summit about 775 m above sea level (NN) near Torfhaus in the unincorporated area of Harz in the county of Goslar in Lower Saxony.

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.

Torfhaus is a village in the borough of the mining town of Altenau in the Harz mountains of Germany and lies at a height of about 800 m above sea level (NN). It is the highest settlement in Lower Saxony. This small settlement consists mainly of restaurants, youth hostels, ski huts and large car parks. A resort area with hotel and cabins was built in 2012/2013. The B 4 federal road, which is a major traffic route, runs from Brunswick to the north via Torfhaus to Braunlage and on into the South and East Harz. Today Torfhaus is a popular start point for walks along the Goethe Way to the Brocken, but also to the historic Dreieckiger Pfahl boundary stone and on over the mountains of the Wurmberg or Achtermannshöhe to Braunlage.

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.

The Sonnenberg is a ski resort in the Upper Harz surrounded by the Harz National Park. The settlement of the same name located there is part of the borough of Sankt Andreasberg.

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.

Altenau ([ˈaltə.naʊ] ) is a town and a former municipality in the district of Goslar, in Lower Saxony, Germany. Since 1 January 2015 it is part of the town Clausthal-Zellerfeld. It is situated in the middle of the Harz mountains, between Clausthal-Zellerfeld and the Brocken. It was part of the former Samtgemeinde ("collective municipality") Oberharz.

The Oker Dam (German: Okertalsperre) is a dam in the Harz mountains in Lower Saxony, Germany. It is fed by the River Oker.

Romkerhall (also frequently called Romkerhalle) is a popular tourist destination on the River Oker in the Harz Mountains of Germany. There is a public car park here as well as a hotel and restaurant opposite the Romkerhall Waterfall. Romkerhall lies within the unincorporated area of Harz in the Lower Saxon county of Goslar in the Harz Mountains. The hotel and waterfall form a small tourist attraction which is marketed as the "Kingdom of Romkerhall - the smallest kingdom in the world!" (German: "Königreich Romkerhall − das kleinste Königreich der Welt!")

The Feigenbaumklippe is a rock formation in the Oker valley in the Harz mountains of central Germany. They lie on the hiking trail from the Kästeklippen crags to Romkerhall Waterfall. These granite rocks, which show clear signs of "wool sack weathering" (Wollsackverwitterung) are a favourite destination for hikers and offer a good view of the valley towards the west. The observation point has safety railings.

Harz National Park is a nature reserve in the German federal states of Lower Saxony and Saxony-Anhalt. It comprises portions of the western Harz mountain range, extending from Herzberg and Bad Lauterberg at the southern edge to Bad Harzburg and Ilsenburg on the northern slopes. 95% of the area is covered with forests, mainly with spruce and beech woods, including several bogs, granite rocks and creeks. The park is part of the Natura 2000 network of the European Union. In its current form, the park was created on January 1, 2006, by the merger of the Harz National Park in Lower Saxony, established in 1994, and the Upper Harz National Park in Saxony-Anhalt, established in 1990. As the former inner German border ran through the Harz, large parts of the range were prohibited areas, that apart from the fortifications had remained completely unaffected for decades. Today the park covers parts of the districts of Goslar, Göttingen and Harz. Rare animals of the Harz National Park include the white-throated dipper, the black stork, peregrine falcon, the European wildcat and especially the Eurasian lynx. The last lynx in the Harz Mountains had been shot in 1818, but in 1999 a project for reintroducing was established. Since 2002 several wild lynxes gave birth. An attempt to return the western capercaillie (Auerhuhn) however did not succeed.

The Kästeklippen, often shortened to Käste, is a rocky tor above the Oker valley in the Upper Harz mountains of central Germany. It lies at a height of 602 m above NN. Near the Käste are other similar granite rock formations such as the Hexenküche ("Witch's Kitchen"), Mausefalle ("Mousetrap"), Feigenbaumklippe and the Treppenstein. Next to the observation platform is a protruding rock which resembles the face of an old man and is called Der Alte vom Berge ("Old Man of the Mountain"). The rocks consist of granite "wool sacks", typical of the Harz region. The Kästeklippen (Klippen = crags) are a popular destination in the Harz. From here, there are views to the Sudmerberg hill in the borough of Goslar. Numerous paths lead from the Oker Reservoir, Romkerhall, Oker, Göttingerode and Bad Harzburg up to the Käste. The most important access route is the Kästestraße. It runs from Bad Harzburg up to the Schlackenplatz on the Morlberg and then continues at a height of just under 600 m over the Alte Schlewecke and the crags of the Stiefmutterklippen to the Käste. From there it goes downhill again, past the Hinterer Ziegenrücken and Vorderen Ziegenrücken to Oker. The Kästestraße was once tarmacked all the way from Bad Harzburg to the Käste. Remnants of the asphalt surface can still be seen today. From the beginning of April to the end of October a bus service runs from Bad Harzburg to the Käste. The Kästehaus restaurant was demolished in 2019. The Kästehaus is checkpoint no. 118 in the Harzer Wandernadel hiking trail network.