When looking through the 267 "Ladder" images at Acclaim Images.com this Building fire escape / roof access stair. was a favorite.
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Description:
Building fire escape / roof access stair.
Escape route ladder route up to the sky. Concept of future progress.

Some related terms for more images:
horizon,  escape,  alex hinds,  emergency,  sky,  path,  future,  route,  ladder,  passage,  unknown,  bright,  climb,  way,