While I don't think I'd appreciate someone spraying an inconsequential tag on the side of my house, I can't deny the beauty of some graffiti. Sure the simple pre-pubescent name tag is like the Foursquare tweet after the fact. Like a well-conceived blog entry, however, complex graffiti art can have gravitas, relevance and consequence, often bringing colourful chaos to bleak order.
For almost two decades the CN Tower in Toronto was the tallest free-standing structure in the world. Big money in Malaysia and the UAE has made such a claim historic at this point, but the cool perspective in this pic relays the effective distance from ground to main deck on the tower.