Tel Aviv 
Zurich
New York
BerlinDispatchwork, is a project by Jan Vormann, where he fills up holes in the walls in Tel Aviv, New York, Zurich and many other cityes with LEGO bricks.
People of all ages in Berlin, the city where he lives, rose to the occasion helping him fill-up these holes created by bullets from World War II. You can find many of his works in Urban Interventions book...
http://www.janvormann.com/
