Viewfinder competition: win a £150 hotels voucher

The hardy (or foolhardy) gather on this town’s beach today for an annual swim whose origins date back 100 years … Photograph: Christopher Furlong/Getty Images

… colourful streets, miles of sand, medieval walls and a handy national park make it popular with tourists … Photograph: Alamy

… who also take boat trips to a 1,000-year-old monastery. The first oranges seen in the country were unloaded here. Name the town. Photograph: 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 bolt holes to boutique hotels. Hotels.com customers can get a night free for every 10 stayed with its rewards scheme. Email your answer by Thursday, 30 December to viewfinder@observer.co.uk 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 Syracuse, Sicily. The winner was E Jackson, from Bristol. Photograph: Hulton-Deutsch Collection/CORBIS