Amsterdam is certainly a contender, but I was actually more impressed with rural Austria. That country is still very much automobile country, but most of their roads aren't even 2 lanes. One lane only. If two cars in opposite directions come to each other, one of them has to duck into a driveway, or back up to the intersection to let the other through. It seems crazy, but the amount of money they save by not having to maintain so much roadway, is actually a major part of why they are so wealthy. They also save because with such meager roads, they don't have to have the hard core water filtering plants you see in the States. And those crazy narrow one lane roads are meticulous.