MNN - Mother Nature Network

Although jungles and sidewalks are completely different landscapes, it is possible to have a green trip in both rural and urban destinations. Walking is not only the best mode of transport for responsible travelers; it is also the best way to truly soak in the sights and ambiance of a city. That can be a challenge in a major urban area if visitors find themselves standing on the wrong side of an uncrossable avenue or dodging traffic as they hug the curb. So which big cities offer the best pedestrian infrastructures? Here's our list.