Radhausberg - Thermal Treatment Tunnels

To the west of Böckstein rises the Radhausberg, with gold mines which were worked from time immemorial (most recently in 1910-27 and 1938-44; a gold-mining museum is in course of construction). A shaft 2.4km/1.5mi long driven through the hill in 1940 was converted after the war into a new form of treatment facility, using the warm (up to 41.6 deg C/106.9 deg F), humid and radioactive air in the tunnel. Patients are conveyed by electric railroad to the treatment rooms in the tunnel.