EuroVelo 15 begins in the village of Andermatt in Switzerland. From there the ride up the Oberalp Pass is the toughest part of the whole route: leading cyclists up to an altitude of 2,044 metres, and the source of the river, before rapidly sweeping down to the lush Surselva alpine valley. Ahead lie the wild Ruinaulta Gorge, glaciated valleys and the majestic Lake Constance surrounded by a landscape of orchards and castles. From the lake, EuroVelo 15 heads west along the Swiss / German border, passing the roaring waters of the Rhine Falls near Schaffhausen and the Roman remains at Augusta Raurica.