Viewfinder competition: win a £150 hotel voucher

This desert city lies on a famous old trade route and at the end of one of the world’s highest highways, which passes through the “valley of blood”. Photograph: Jonathan Blair

The culture of its native inhabitants is different in almost every way to the majority of the country. Photograph: Alamy

It stood in for a war-torn city in a film that reached for the skies. Name the city. 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 8 March 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 Sion, Switzerland. The winner was Victoria Collins, from Stafford. Photograph: Alamy