There is a large network of hiking trails (Harz Club) which is very well signposted. Nordic walking routes are also well signposted. For the more adventurous you can walk from Clausthal Zellerfeld to Goslar. This is a 16.36-km hike in Clausthal-Zellerfeld, Germany. The hike has a total ascent of 198 m and has a maximum elevation of 764 m.
Oberharzer Bergwerksmuseum
The Upper Harz Mining Museum in the Zellerfeld district is one of the oldest museums in Germany dedicated to the history of engineering. You can go back in time and discover the development of ore mining in the Harz, the hard working conditions and the ingenuity of the miners in various exhibitions and you can look at the original mining installations outdoors. One of the highlights is the famous man engine, an adventurous but effective method to get quickly into great depths.
Geosammlung der Technischen Universität Clausthal
The collections of the Technical University are among the largest in Germany.
Oberharzer Wasserregal
This is a system of dams, reservoirs, ditches and other structures, much of which was built from the 16th to 19th centuries to divert and store the water that drove the water wheels of the mines in the Upper Harz. The word Regale stands for the granting of royal privileges or rights in this case to permit the use of water for mining operations in the Harz Mountains. The Upper Harz Water Regale is one of the largest and most important historic mining water management systems in the world. In the system of the Upper Harz Water Regale there are over 35 such tunnels with a total length of about 30 km. It has been listed as a UNESCO world heritage since 1992.
Marktkirche zum Heiligen Geist
The original church was destroyed in the great fire in 1634. It was decided to replace it with a wooden church, which was completed in 1642. It is now the largest wooden church in Germany and can seat up to 2200 people. Inside there's a massive organ and a great altar.
Lutheran church with an altar painting by Werner Tübke.
Imposing building from 1673.