Viewfinder competition: win a £150 hotel voucher

Few places in the world can match the extraordinary history of this ancient city – it was once a wonder to behold. Photograph: PR

Colourful characters have played out their global ambitions here – empires have been built, fought over, and lost. Photograph: AP

It had a key role in the dramatic removal of its country’s most recent leader. Read all about it! 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 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 9 August 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 Portishead, Somerset. The winner was Samantha Pope, of Warley, Essex Photograph: Alamy