The tunnel was excavated between 1855 and 1886. However, enough was never really found here and so it only leads a little more than five hundred meters into the mountain. …
The glass tunnel in the Hüttengrund is a testament to the early years of Marienberg mining and was built in 1523 as a hereditary tunnel to drain the Marienberg central …
The "Freudenstolln" was already started in 1592 by Jacob Uthmann, but he had to drive it before he reached the underground works of "St. Briccius” had to be discontinued for financial reasons.
Due to the spoil heap opposite, you can guess how deep the tunnel was once driven into the mountain. For safety and natural reasons, you should definitely refrain from entering.