Eye catching street art from 6 populated continents

This photo of an Atlanta, Georgia tunnel is by Brian T. Murphy. This is Murphy's personal website, or peruse his gorgeous images on Flickr.

Paper street art from Houston, Texas by Flickr photographer EDgAr H.

This photo courtesy of Axel Goyeneche of K.E.L.P. who says of the image and his work and website: All the pictures at the KELP Flickr account are walls I painted (alone or with friends). By the way www.kelp.cl is a webportal, the most visited worldwide “about graffiti meets design,” and all the K.E.L.P walls can be seen here.

There are hidden messages in this politically loaded piece from Olympia, Washington. You can pop over to dreamsjung on Flickr to see how many you identified.

Photo by Matt Kowalczyk AKA Nomadic Entrepreneur on Flickr who credits the artist of this piece seen in Leblon, Rio as Gemeos.

The ubiquitous Maradona - a portrait of the player in his glory days before he came into his more contemporary look as he clings to youth through a series of progressively more obvious plastic surgeries that make you wonder if he has to inflate his face in the morning when he shaves. Photo from Buenos Aires by Diego_3336.

Photo from Morocco by Ryan Ritchie who says, "It was the first thing that caught my eye upon arriving in Essouaria." Check out his Flickr Page where he goes by ryantron..

Photo (and feature photo) of a Kansas City wall by aeionic who says: Graffiti artwork, like most street art is often illegal and therefore the better works are often executed off the beaten track where they can be created with less time constraints and less risk of arrest. The artists are also reclusive and worried about prosecution, so a little footwork is often necessary to locate the better works. This female artist, Femme9, often creates faces and collaborates with others such as Motor in this photo. One enjoyable aspect of street art is the sheer exuberance of discovering young counterculture artists. Combined with an enduro motorcycle and a digital camera, one can cover a lot of alleyways, abandonments, and railroad tracks. Ahhhh, freedom!

Photo by Michael Hughes from Walsall, England. View the original photo and more on his Flickr page where he's known as micheal.jh.

As seen in San Francisco, this piece of street art knows no true location. Photo by Franco Folini.

A mixture of iconic imagery and bright colors make this wall of stencils pop and provoke the imagination in Tokyo. Photo by antjeverana

Walls from Wroclaw, Poland by mr. zero. Visit mr. zero on MySpace.

Sweet romance and a bike in San Francisco. Photo by Salim Virji.

A face repeated with photographic fidelity in St. Margrethen, Switzerland. Photo by Kecko.

Street Art São Paolo, Photo by journalist Adriana Paiva who credits the artist as osgemeos. You can check out Paiva's website here, or click here for a look at her Flickr photo stream.

This tunnel from Sydney University won't let the eyes rest. Photo by Str1ke.

Cute little doggie from Tokyo. Photo by yeowatzup.