My cousin gave me this book for Christmas.
It has organized different warning signs that use pictograms into various categories by giving actual examples. It’s written humorously and the pictogram photos are fun. You can see similar stuff here: http://www.pictosan.com/ (Enter site and scroll down.)
So I looked for my “Pictosan” – the name used by the author of the book to personify the guy in the warning sign – from trips I’ve taken. I thought I had more but found just a couple of the “warning sign” kind.

I should've gotten the text but didn't. I'm not actually sure if this is meant to prevent you from using the hand drier from blowing into your face or if it's telling you that it's the correct way to use it. Found in a hotel powder room in Cannes, France.
More pictograms below but these are non-warning types. I just find them really cute.
Restroom signs @ “Tesco” in Prague, the Czech Republic.
Subway stations in Prague.
In Vienna, Austria.