Viewfinder competition: win a £150 hotel voucher

Take the pulse of this lively capital, the world’s second-largest desert city. Photograph: Alamy

Feast on the best food on its continent, from hot spices to cool marinated fish, and try not to drink too much of the delicious sweet-sour local tipple. Photograph: Alamy

Home to a 450-year-old university, the “city of kings” is often best enjoyed from hills that rise above the clouds. 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 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, 27 October 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 Winchester, Hampshire. The winner was Sheena Scott, from Kilbirnie, Ayrshire. Photograph: Alamy