In early 2010 one of the mining tunnels collapsed, leaving a 50m deep hole.

In spring of 2001, the mining tunnel connected to the museum was reopened.

The miners also had to cope with difficult circumstances when they entered the mining tunnels.

A mining tunnel was excavated and made accessible to visitors.

Sprinting across the open space of the mining tunnel, Garrovick knelt over his friend.

The entire operation has been destroyed," Spock reported from his viewer, "with the exception of a few mining tunnels.

He was in yet another mining tunnel going straight back into the mountain.

Exhibitions include a replica of a mining tunnel and an assayer's office, both which visitors walk through.

The canal fills a mining tunnel at the bottom of the Schlossberg.

Paying more attention to the meanderings of the mining tunnel, he said "All right, I'm calm."