Viewfinder competition: win a £150 hotel voucher

One of few cities to have an extinct volcano within its boundaries …
Photograph: Getty Images/Vetta

… this is in the world’s top 10 green metropolises and a capital of cycling.
Photograph: Getty Images/Aurora Creative

Its citizens enjoy excellent coffee and the output of its 28 breweries – all in a pleasant climate suited to cultivating a symbol of love. For one rocker it was the home of the love of his life. Name the city.
Photograph: 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, 8 September 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 Odessa, Ukraine. The winner was Ruairi Reeves, from London Photograph: Reza Estakhrian/Getty Images