In a city blanketed by snow for five months each year, you wouldn't blame cyclists for putting their bikes into hibernation during the winter.
But the people of Oulu, Finland, are made of stronger stuff.
Despite the long, dark, and snow-filled winters, locals keep pedalling their way to and from work and school.
Around one-in-five of all trips made in Oulu are by bike, a figure that falls to 12% in the winter. By comparison, in London, around 2% of all trips are made by bicycle. In the Dutch cities of Utrecht and Amsterdam half of all journeys are on a bike, against a third in Copenhagen. Further south in the capital Helsinki cycling, on average, represents 9% of trips.