This volunteer-run museum occupies the former electromechanical signal box at Olympia-Stadion U-Bahn station, preserving a historic lever interlocking system along with over 300 objects documenting more than 100 years of Berlin U-Bahn history. Exhibits span signal boxes, ticket machines, vehicle technology and station clocks, with staff on hand to explain the equipment, and a small souvenir shop is open during visits.
Clemensfranz, CC BY-SA 3.0