Viewfinder competition: win a £150 hotel voucher

This city has produced two blond bombshells – one is a predator of the seas, the other a global campaigner for free speech. Photograph: PR

A British explorer was left in a spin when he sailed close to an island just off the coast.
Photograph: Charles Stirling/Alamy

A castle dominates the city but it’s the Cowboys who are the hotshots in town. Name the city. Photograph: Ian Hitchcock/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 24 May 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 Rosario, Argentina. The winner was Mark Ryder, from Hemel Hempstead Photograph: Alamy