19. Arosa, Switzerland Arosa is an Alpine resort village in the Schanfigg Valley, in the Swiss canton of Graubünden. It’s known for its lakes, ski slopes and trails like the Squirrel Path. Boat-dotted Obersee Lake has a seasonal water display with fountains, lights and music. Untersee Lake has a sandy beach. West of Arosa is Weisshorn, a mountain peak accessible by cable car. It has views toward the city of Chur and Piz Bernina Peak.