Furka Tunnel Simplon Tunnel Ceneri Base Tunnel Gotthard Base Tunnel
Carpathian Mountains Jura Mountains Pyrenees Mountains Cambrian Mountains
Rumansch French German Italian
1.75 million 75 million 37.5 million 7.5 million
River Seine River Rhine River Oder River Rhone
Lake Constance Lake Lucerne Lake Neuchatel Lake Geneva
France Germany Austria Italy
Pyrenees Mountains Jura Mountains Alps Carpathian Mountains
Lucerne Bern Zurich Geneva