Switzerland’s longest river, which flows from Alps via lakes, has carved its way through the mountains in Gorge. Tunnels and wooden walkways allow all the visitors to experience the natural wonders with little real effort. Here the water is around 3 meter deep while the limestone rock walls reach nearly 200 meter high and the speed of the water flow ranges from 4-13 km per hour. This will be an exceptional experience for you which you will cherish all your life.