Abandoned Gold Mine

We learned about this abandoned gold mine completely by chance, while visiting Fort Bard. Knowing practically nothing, we set off for Brusson. In Brusson, we pulled out a laptop and, after a bit of Googling, realized that the mine should not be sought in Brusson itself, but in its suburb, the small town of Fenilliaz. It was getting dark. You can count the number of houses in Fenilliaz on your fingers. Still, it offers a great view of the mountains.
After wandering around a bit, we realized that looking for the mine at random was practically useless — the mountains surrounded us on all sides, so how could we possibly guess where it was.
Gathering our courage, we approached a local tractor driver. He pointed with his finger in the direction we should go.
Already in the forest, we saw a sign with the inscription "Brusson minervi". The goal was close....

A bit of history.
This mine has existed since ancient times and was exploited at different periods. In 1740, a 1 kg gold ingot was found here! At the end of the 19th century, interest in the mine revived again. However, the work was soon abandoned and resumed in the 1930s.
The most common mineral in this mine is quartz; pyrite is also found, but the most interesting one from the point of view of extraction is, of course, gold.