London: Banksy tunnel - this weekend only [updated]

"Graffiti artist Banksy has turned a south London tunnel into a half-mile long exhibition space, but the elusive artist kept its location secret until the last minute, reported the BBC. Banksy marshaled more than three dozen international artists for what he's calling the "Cans Festival" - and is encouraging visitors to contribute their own graffiti starting Saturday.

Members of the public are being invited to take part in Banksy's latest project in London, as an army of graffiti writers turn a whole street into an art exhibition. "

More: www.thecansfestival.com

UPDATE: on Flickr