When you get to Copenhagen, one of the first things you see are people riding around on brightly-colored bicycles with a little map of the city attached to the handlebar. Turns out they're community bikes, available to all. There are a number of places around the city where the bikes are stored. You go there, insert a 20 kroner coin (about $4) into the locking mechanism, and away you go. When you return the bike to one of these collection points, your 20 kroner is reimbursed. Very cool. Of course this is a city, too, where the bike lanes are as wide as car lanes. And being used by a lot of bikes. Turns out there are over 12 million bicycles in use in Denmark. For a population of 5.4 million. Sounds like the ratio of cars to licensed drivers here in the U.S.