Mountain Biking Highlight
Recommended by 34 out of 35 mountain bikers
Location: Marienberg, Erzgebirgskreis, Saxony, Germany
The glass tunnel in the Hüttengrund is a testament from the early years of Marienberg mining and was created in 1523 as an heir tunnel to drain the Marienberg central district. At that time it was the deepest tunnel south of Marienberg with a length of 3.5 km.
May 13, 2020
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