It might be seen as vandalism, but for street art appreciators, trains are potential canvases. When artists come up with good looking art, it just makes cities a little happier.
The first 4 images are in Abduzeedo's home town, Porto Alegre. All the others are from several cities around the globe. These are very creative, and I gotta say that for these, usually the most colorful ones are simply the best, but of course, it also depends on the overall style. Well, don't forget to visit each one of these! I hope you enjoy them. Cheers!