Better to employ an enormous grey wall for artistic purposes than leave it a towering eyesore? Palestinians and foreigners alike have been painting the Israeli government's separation wall since construction began. But on both the Israeli and the Palestinian sides of what has been dubbed "the wall of shame", there are those who don't want it to be coloured in, and for very different reasons. Read more...

The "Guerrilla Gardeners" are growing in number. Armed with spades and rakes, these activists are on a mission to create green spaces in our city centres. Read more...

For a year now, elusive character "Poster Boy" has been busy in the tunnels of the New York subway, hacking up unsuspecting victims with a razor blade. His prey? Posters, which he mutilates right under the nose of the police. Read more and see the pics...

After tecktonik dancing brought gyrating teenagers to metro platforms around the world, a new electro bop has arrived on the scene. The "Melbourne Shuffle" has attracted flocks of movers and shakers, with over 600 new videos uploaded every week. Read more...

Along with the explosion of surveillance cameras comes a new type of filmmaking. Using a technique called "video sniffing"; the pirate filmmakers capture CCTV footage from shopping centres and the police to "retake control of their environment". Read more and see our selection of sniffed videos...

"Le Brigadier" (the police sergeant) is a French rapper who keeps his identity well hidden. And with good reason - he claims to work as a policeman in the suburbs of Paris. Rapping about police blunders hasn't gone down well with the rest of the force though, leading to an internal enquiry into his identification. Read more...

For the seventh year running, the banks of the river Seine in Paris have been transformed into an elongated Club Tropicana set. No less than 2,500 tonnes of sand are shipped in to the capital to make "Paris-on-sea" each summer. An event that not all of the city's residents take to warmly. Read more...

Without brakes, freestanding wheels, and possessing only one gear, the "fixie" can already be seen tearing down the streets of the world's metropolises. This new kind of bike has lured fans with a fervour from San Francisco to Tokyo.See the videos and read more...