You can find a lot of pictures in german newspapers and magazines, i.e.: http://www.spiegel.de/fotostrecke/bombenfund-experten-spreng...
http://en.wikipedia.org/wiki/Strategic_bombing_during_World_...
There was lots of industry (BMW, Dornier) in Munich, a few important airports and it was the Capital of the Movement, i.e. the place where the whole Nazi BS started[1].
Also, towards the end of the war, the western and eastern "fronts" basically swept through all of Germany. Munich was attacked by American forces near the end of the air (they also liberated the near by concentration camp while they were at it). Fighting was not as fierce as other urban battles.
http://edition.cnn.com/2012/08/29/world/europe/netherlands-a...