Anything painted on a large structure is mural. Like the back of a building or a wall. Kathmandu, the capital city of Nepal has been a hub for such creativity from local and foreign artists around the world in recent times. Here is the link with images and the full story.... - http://www.detechter.com/mural...

अत्ति दामी रहेछ यार ! खतरा

Beautiful...