Viewfinder competition: win a £150 hotel voucher

This capital city and port played a key role in pushing the boundaries of world trade eastwards…
Photograph: dbimages/Alamy

… exports of goods such as mother of pearl brought riches and naval might, and allowed the city to seize control of an exotically named island in the 17th century …
Photograph: Michael Freeman/CORBIS

… athletes from dozens of countries will hit the beach here next month. Name the city.
Photograph: Pep Roig/Alamy

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 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 11 Nov 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 Ruthin, Denbighshire. The winner was Sally Hall, from Reigate, Surrey.
Photograph: Andrew Caballero-Reynolds/Reuters