Railway Shelter Tunnel in Strzyżów

It is the only underground railway shelter in Poland and the second of the facilities designed to protect German trains in the current Podkarpackie Voivodeship. When in August 1941 Adolf Hitler received Benito Mussolini in nearby Stępina, his armored train "Amerika" was hidden from the "sight" of the allies in Strzyżów.The railway shelter is hidden inside Żarnowska Góra. It is 438 m long and the ceiling is almost 6.5 m high. Like the above-ground structure in Stępin, this one was also built in 1940-41. The walls of the tunnel were made of concrete and reinforced concrete, and the vaults were made of clinker bricks. The entrances to the tunnel on both sides were closed by 11-meter-long vestibules, each of which was equipped with powerful two-part iron doors.Source and more:
podkarpackie.eu/turystyka/schron-kolejowy-w-strzyzowie