Viewfinder competition: win a £200 hotel voucher

This city is famous for shopping, trade and a cocktail the same colour as the national flag. Photograph: PR/PR

It is forever linked to the world of the cats, yet is also a key transit point for migratory birds. Photograph: PR/PR

It has one of the world’s busiest airports, and you can eat food from just about any continent here – just be sure to take your rubbish with you. Name the city. Photograph: Eternity in an Instant/Getty Images

This week’s winner will receive a £200 voucher from Hotels.com, which can be used at more than 200,000 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 Welcome Rewards scheme.
Email your answer by 28 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 Newfoundland, Canada. The winner was David Ellams of Manchester. Photograph: Alamy