Ruins of St. Joseph’s, Chicago at Rush, 1871, Chicago.
I love this photo for the fact that you can see the photographer’s shadow.
Aftermath of a fire at a cold storage facility, 54 E Hubbard, 1958, Chicago.
Aerial view of the Our Lady of Angels fire, 909 N Avers in Humboldt Park, 12/1/1958, which killed 92 children and 3 nuns.
http://en.wikipedia.org/wiki/Our_Lady_of_the_Angels_School_fire