The Romsdal Valley, through which the Rauma river passes to the Romsdalfjord, has been described as a worthy rival for Yosemite, being surrounded by the mountain range Romsdalsalpene. The 1,550 meter tall Romsdalhorn has been compared to the Matterhorn, while the Trolltindane peaks, according to legend a bridal procession of trolls turned to stone by the morning light, stands opposite across the Rauma. The North Face of Trollryggen peak (1,740 m), Trollveggen (Troll Wall), is the tallest vertical cliff in Europe. Norway's most famous hair-pin road is Trollstigen, or "Troll's Trail", which leads to the south out of Åndalsnes to the beautiful Geirangerfjord.
The Rauma river originates in Lesjaskogsvatnet, a lake with outlets at both ends, in the adjacent mountain municipality of Lesja. A dam was constructed by the Lesja Iron Works in the 1660s to improve transportation obstructed the Rauma and caused the water to flow both west to the Rauma and eastward into the river Lågen.