Viewfinder competition: win a £150 hotel voucher

A leading 20th-century architect made his mark on this ancient port … Photograph: Alamy

… and Zaha Hadid and Norman Foster have given the harbourfront and skyline a makeover for 2013. Photograph: Alamy

It gets its hands dirty with oil refining, but has strong musical roots from opera to hip-hop, all washed down with a famous aniseed tipple. Name the city. Photograph: Sami Sarkis/Getty Images

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 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, 11 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 Blackpool. The winner was Diane Halliwell, from Morecambe Photograph: Alamy