Tschuggen Grand Hotel

Loll in the hotel's Bergoase spa. Reached by a glass bridge, this cavernous space is sensational: glass roofs shaped like great sails slice through the hillside.

In the Swiss ski resort Arosa, Tschuggen Grand Hotel is a futuristic slice of five-stardom, and the spa its trump card - enclosed in a sail-shaped skylights of stained glass.