Brrringggg! Brrringggg! is the sound heard most often in Amsterdam and the more than 800,000 bikes in the city really keep you on your toes. There are about four times as many bikes as there are cars. Almost all streets have bike lanes and I once did a double-take when looking at a parking garage, realizing that it was filled with bikes and not cars. I love how some people dress up their bikes with flowers on the handlebars, presumably so that they can find their bike in the morass of parked bicycles. It's amazing to see a city with its infrastructure built around bikes rather than cars.