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StrahllochBridgeAndTunnelOfGotthardbahn Section AdolpheBraunto. en The image shows the original Strahlloch Bridge or Viaduct and the directly adjoining Strahlloch Tunnel at km of the Gotthardbahn Strahlloch Bridge and Tunnel are part of the double loop in Wassen on the northern access ramp to the Gotthard Rail Tunnel Going south