This mine is an extremely dangerous and unstable old coal mine in Germany.
We visited the mine last year.
After nearly 2 hours of searching for the entrance (small hole in the ground) we finally got inside the mine.
It was very narrow and we had to walk on our knees often.
The air was good all the time, no gas.
It was very unstable everywhere and on some points the tunnels were already collapsed.
There you can see the coal.
This is me mining some coal haha
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greets @sral
dang one day you're going to find a dead body in one of these caves.