German artist Jan Vormann patches bullet holes, cracks and other damage from World War II with plastic building blocks in a project called 'Dispatchwork'.

Guerilla marketing is about using a small budget for big results. Here are guerilla marketing campaigns, 22 ads from bizarre to brilliant.

Cellophane, the plastic stuff that keeps your sandwiches fresh, isn't a conventional art tool. But these two projects use it to temporarily spruce up cities.

The debate rages on if graffiti is art or vandalism. Whether freaky or fantastic, writers spread holiday cheer with these 40 Merry Christmas graffiti greetings.

Parkour is an extremely challenging urban sport that involves big jumps, impressive acrobatics, and a lot of guts. This group captured all that in a crazy jump.

Some USB guns are fun, but some are used to strike fear in your cubicle-neighbor's heart. Here are 17 USB "weapons" made by geeks for geeks, from FAIL to fantastic.

Body modification covers anything from ear piercings to circumcisions, but there's a niche that involves the most extreme manipulation of the human body.

By now, we're all so used to seeing graffiti that we ignore it. But would you be able to ignore graffiti using a medium or a method you'd never seen before?

How many different ways can you upcycle an old dumpster? The Skip Conversions project turns them into swimming pools, skate ramps and more.

Chilean artist and designer Sebastian Errazuriz creates fantastical designs and urban art. His product designs and guerrilla art are original and amazing.

Graffiti comes in all shapes, sizes and styles. Most of us have seen different styles of graffiti, but how often do we really pay attention to the composition?

Performance art at its best is when the performers, their environment and the audience all interact. This amazing urban dance project accomplishes that and more.

While no one is sure why or how Stonehenge was built, our fascination with it is long-lasting. These replicas all pay homage to the original English enigma.

Whether using the streets as a blank canvas or masterminding 'interventions', these street artists help change the public perception of everyday urban life.

Propaganda, presented graphically as posters, pamphlets and pictorial artwork, aims to influence the attitudes of people to serve the purposes of the propagandists. Here are 13 examples of propaganda showing it at its best, worst and purest.