Hardtstollen, Mining tunnel entrance at Hardtberg, Wuppertal, Germany
Hardtstollen is a mining tunnel at Hardberg in Wuppertal that extends roughly 250 meters into the mountain beneath the Bismarck Tower. The rock cover protects the site with a depth of about 80 meters at the summit.
Construction of the tunnel started in the 1960s as part of a planned energy storage project designed to manage peak power demand in Wuppertal. The project was later abandoned, yet left behind this underground structure.
The tunnel connects to the cave system below and reveals the geological features of Hardberg that continue to draw people curious about the hidden natural world beneath the city.
The site is maintained by a local group and open for guided tours on specific days, mainly during an annual geological event in September. It is wise to check beforehand about access and opening times.
Inside sits a large underground chamber called Hardtkaverne, reinforced with steel beams and corrugated sheets. This cavity shows the engineering skill required to build such a structure deep below ground.
Location: Wuppertal
GPS coordinates: 51.26108,7.16628
Latest update: December 14, 2025 18:11
Hardt
501 m
Botanischer Garten Wuppertal
408 m
Bibelmuseum
670 m
Bismarck Tower
182 m
Die Börse
694 m
Elisenturm
325 m
Waldbühne Hardt
595 m
Wunderbau
532 m
Hardtberg
434 m
Schwebebahn station Völklinger Straße
564 m
Gerichtsinsel
489 m
Schwebebahn station Landgericht
430 m
Pauluskirche
112 m
Bandfabrik Wilhelm Büsgen
358 m
Kirche Herz Jesu
608 m
Haspeler Brücke
330 m
Gesellschaftshaus Union
605 m
Elisentreppe
570 m
Meisenburgsche Häuser
484 m
Friedrich-Engels-Allee 142
295 m
Friedrich-Engels-Allee 146
300 m
Justizzentrum Wuppertal
581 m
Hardthöhlen
429 m
Die Sinnende
422 m
The judgement
497 m
Stolperstein dedicated to Johann Babtist Steinacker
325 m
Landgerichtsgebäude Wuppertal
439 m
Stolperstein dedicated to Emilie Röttgen
610 mVisited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes