Subvertisements are an excellent means of turning the commercial world around you upside down, make humorous or critical commentaries on consumer society, or even get rid of ads altogether.

The creation of the tallest building in the world has become such a status-seeking quest, cities and countries competing for the title have stopped revealing the planned height of their buildings.

Some are useful, some are silly, but it's the weekend: sit back and relax.

The following seven examples illustrate the fascinating range of Banksy's life and works through his most controversial and compelling projects.

If you aren't already using StumbleUpon to find cool websites about all sorts of stuff, you may not get these jokes - but you should become part of the StumbleUpon social and website network!

Watch some people create 'LED Throwies' out of simple lithium batteries and paint the town with multicolored lights to a mellow tune.

If you had a house that was going to be demolished, scrapped and completely replaced with something else - what would you do with it?

This group has managed to turn a street art hobby into a guerilla marketing campaign strategy.

Google has conquered Earth and apparently looking for new frontiers - too bad they haven't develop Google Moon very much since releasing it.

Agree with the war or disagree, I think this is a powerful image that brings the impacts home.

Like traditional graffiti and street art, light art comes in many forms. Unlike most graffiti, however, there is no one to complain about being tagged!