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In the mid-19th century, flooding from the Göhl River posed a major threat to the mine in Bleyberg/Plombières: Water repeatedly penetrated the tunnels and claimed lives. To prevent this, a diversion of part of the river was requested and approved in 1861. By 1862, a tunnel several hundred meters long was built beneath the rock, keeping the Göhl away from the mine. The construction cost approximately 200,000 francs. The tunnel is a technical monument to mining engineering from an era when hazards were deliberately controlled while simultaneously harnessing hydropower. It demonstrates how work-related accidents were prevented while simultaneously harnessing resources.

The site of the former Plombières mine is home to species-rich calcareous grassland meadows, now protected as a nature reserve. The exceptional flora and fauna of this area are due to the heavy metal-rich soils, particularly the presence of zinc in the subsurface. Among the natural meadow relics, visible traces of the former metal industry can still be found: – Walls from former foundry floors – Remains of old smelting furnaces – Stones from former industrial buildings A small stream meandering through the area further enriches the ecological diversity of this special place. The "Gueule" viewpoint, which offers a glimpse into a cave opening, is particularly impressive and worth a visit.

The Neumühle or Moulin Schumacher is a (former) overcast water mill that is today privately owned. You can see the buildings clearly from the meadow paths and the entrance gate. At the rear there is also an old meadow walking path where you can see parts of the unfortunately removed wheel and interior. Particularly beautiful to see is the supply of water and how the Iterbach and Periolbach form a somewhat fairytale-like environment here. In wet weather you can hear the "waterfall" that forms and is part of the former system from far away. The former corn mill dates from 1823 and both the mill and the miller's house are inhabited but beautiful to see in their surroundings. Source and more information: https://www.molenechos.org/molen.php?nummer=1063

Park with "the house of the mining site", playground, information boards, picnic areas, sanitary facilities, direct access to the nature reserve and more. Info about the "Maison du Site Minier" at https://www.komoot.com/nl-nl/highlight/1038492

If you want to know everything about the streams Pau, Paunelle and Johannesbach, you should take a look at the website I have given below. It's a little too much for one comment. https://oekologie-zentrum-aachen.de/die-aachener-baeche/bachportraits/die-pau-und-die-paunelle/

it is definitely worth seeing.

The Pau flows with a slight incline in the direction of the Aachen basin. Shortly before it flows into the Hangeweiher, a few centimeters of difference in height have to be overcome at once, so that there is a small cascade, a small "waterfall". The bastion-like roundabout next to it is also a quiet resting place.

Here at the Schyns mill, which is privately owned, was built in 1801 and is or was operated as a mill with turbines. Now the mill is also to be operated as a restaurant.