Cycling is popular in Rotterdam. And Rotterdam helps cyclists with, among other things, placing bicycle pumps on the street, storage options, adjust traffic lights more bike friendly and many more! The bikes in the picture are just a part of the many bikes parked in the city near buildings on the sidewalks etc. despite the more than 6800 places in bicycle parking, just not enough probably! I often ride a bicycle to work, to the shops and yes even when it rains!