The Gotthard railway tunnel is an astonishing 57 km long. It was opened 6 months ago. But it is still accessible on foot if you book a guided tour! A window inside the tunnel allows you to see the trains passing by. There's 20% discount for Tell-Pass holders.
For details, please see www.tunnel-erlebnis.ch/UriGotthar dTunnelErlebnis/offer/ detail/TDS000200110935 01673.
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