Hide your valuables otherwise Zorro will burglarize. Here is the european pair. (full size)
Origin: www.telesubjective.org

This one is not really visual but pretty interesting sign. (tells a lot). Another all time favourite: At a distance, objects become smaller

Origin: USA, San Francisco, flickr image by Mòni, (full size)

“Apparently this rr underpass is prone to flooding but people try to cross anyway, resulting in stalled vehicles. So they put up this warning sign, which some folks (like me) find a little funny. It’s nothing special, but it’ll bring a smile to your face if you happen to drive by”
Origin: USA, New Jersey, Allendale (full size)
www.lostinjersey.com

“did you know that in nyc you’ve got to watch for business people crossing the streets… weird i tought that was for kids and animals only :]”
Origin: USA, New York by FOTOJENYK, (full size)

Origin: USA, Vermont by sepoy, (full size)