This wall by Hamburg-based artist 1010 painted for Knoten Festival 2013. Its actually a couple of months old, but it’s too good to just not post it.
1010 creates incredible pieces that gives you the illusion of depth. Each artwork containing colorful “layers” that seem to peel away and show a hidden space deep within the wall.
Just like this piece recently published on his flickr.

1010-knoten-Hamburg-3 1010-knoten-Hamburg-2
Pics by the artist and the festival