Arosa is a small town in the canton of Graubünden in Switzerland. It's both a summer and winter tourist resort, and has a well-known skiing area and boasts over 60 kilometres of slopes. With a population of less than 3 500, there are more than 4 000 guest beds. The town of Arosa is at the top of the Schanfigg valley at the foot of the Aroser Weisshorn (2 653m/8 704ft). The two lakes in the centre of Arosa are the Untersee and Obersee and the railway station is at the end of a branch line from Chur.