Dubbed the Bonnie and Clyde of graffiti: Utah and Ether. These writers from the United States have tagged trains and buildings in over 30 countries. Some of their most adrenalin pumping bombings are definitely the Probation Vacation series, featuring their trips to countries in Asia. As the name is self-explanatory, they left their native country to go on a vacation from their probation (which was a sentence for their previous vandalic acts, naturally). The paths they take to reach those spots are just meticulously insane and make you lose your breath.