The Netherlands has more bicycles than people - 22 million for a population of 17 million - and finding a space to park can be a challenge. To address this problem, the city of Utrecht has opened the world's largest multi-storey parking area for bicycles at its railway station.

The concrete and glass structure has space for 12,500 bikes over three floors, including bikes for rent. It is part of an ongoing drive to enhance cycling infrastructure across the Netherlands.

'There is still so much to be done" says Steinje van Veldhoven, a junior infrastructure minister. 'I'd like us to make better use of what I call this secret weapon against congestion, poor air quality in cities and climate change.