Viewfinder competition: win a £150 hotel voucher

You may know this bilingual city as a gateway to the slopes but, inhabited for 8,000 years and mentioned by Julius Caesar, it has more history than you can shake a ski pole at. Photograph: Sandro Vannini/Corbis Ignore the pseudohistory links and enjoy forests, an underground lake … Photograph: Sportsphoto Ltd/Allstar … one of the world’s highest dams and eau de vie made from sun-ripened fruit. Name the city. Photograph: Prisma Bildagentur AG/Alamy This week’s winner will receive a £150 voucher from Hotels.com which can be used at more than 120,000 places to stay across the world, from quirky B&Bs and family boltholes to boutique hotels. Hotels.com customers can get a night free for every 10 stayed with its rewards scheme. Email your answer by Thursday 1 March to [email protected] or send a postcard, with address and phone number, to Viewfinder, The Observer, Kings Place, 90 York Way, London N1 9GU. ■ Last week’s answer was Bridlington, East Yorkshire. The winner was Joyce Ballingall, from Dundee. Photograph: Franck Guiziou/Hemis/Corbis