Light graffiti, also known as light painting, is a kind of leave-no-trace, sustainable and incredibly awesome temporary graffiti if captured right by clever photographers.

The Mona Lisa is one of the most famous historical paintings of all time and, as such, has spawned a great many look-alikes, fakes, copies and other derivative works.

Artists like Kurt Wenner, Eduardo Relero and Tracy Lee Stum create street art that's so incredible...

Some guerrilla marketing is even done to support good causes though much of it is created to line the pockets of giant corporations.

From seed vault to military hideouts and diamond mines to nuclear waste dumps, here are seven more underground wonders of the world.

The European Union may appear on the surface to be a unified body but underneath each member country retains a unique and complex history.

Here are seven more geek graffiti projects that comment on and employ tools of the digital age to reinterpret traditional street art approaches or convey contemporary messages via new media.

Never underestimate the power of simple office supplies.

The following examples span the spectrum but share elements only a geek can fully appreciate.

The subject of graffiti often brings out strongly polarized reactions from urban dwellers, who either support it as art or criticize it as vandalism.

San Francisco has a rich history and culture that spans a diverse set of groups time periods.

Most would argue that graffiti removal is at best the elimination of vandalism or at worst the destruction of art, right?

Here's a look at three types of urban light art: dorm room tetris, lightstick air animation and architectural projection bombing.

Here are three examples of strangely legal urban street art from artistic Japanese manhole covers and creatively painted American circuit boxes to downright bizarre Russian street lamps.

Here are seven examples of green creativity that involve alternative uses of natural materials.