Niagara Falls, Ontario's Nightmares Fear Factory has a Flickr feed full of visitors being terrorized in its environs. Interesting to note the emotional response (and a few ones that do not) facing a understood false danger, suspension of disbelief in action.
Japanese warning signs are very different than warning signs in other parts of the world, because they usually contain a visual and easy to understand reason why something is dangerous or not allowed.
Anat Levin, Dani Lischinski, Yair Weiss - a computer-assisted process of adding color to a monochrome image or movie with a relatively modest amount of user input.
"...And these atomic bombs which science burst upon the world that night were strange even to the men who used them." The World Set Free. H.G.Wells 1914
"This are a few pictures that I have taken while working as a Helicopter Pilot over Mexico City , although brightness and contrast has been tweaked on some, they are all REAL."