Viewfinder competition: win a £150 hotel voucher

Perhaps you can crack the code in this ancient city which has been fought over for centuries. Photograph: PR

But be prepared to cross the line if you want to head from north to south. Photograph: PR

It’s one of the world’s richest places so perhaps it’s no surprise one businessman on the run found it a comfortable bolthole. Name the city. Photograph: PR

This week’s winner will receive a £150 voucher from Hotels.com which can be used at more than 150,000 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 September 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 St Louis, US. The winner was Roger Cox from Scunthorpe, Lincolnshire. Photograph: PR