https://www.knesebeckschacht.de/en/visitor-info/hydrocompressor-tower?shortcut=1&uid=55&cHash=dc5c6a6fbd3c734ef54b7ddcff69120a
Bergbau-Museum Knesebeckschacht Erz-Bergwerk Grund: Hydrocompressor tower
The most prominent feature of the Knesebeck installations is the 47 m high hydrocompressor tower.
bergbau museumerzbergwerkgrundtower