Here's some signs, we came across when traveling. Why? Just because I like them :-)
From left to right, top to bottom:
Iceland: Blindhead? now what?
Namibia: so for 80 kilometers we have to be aware of all dangers imaginable?
Namibia: the road as we know it will come to an end!
Argentina: beware of strong winds, it took us some time to figure this one out.
UK: beware of sheep :-)
Canada: beware of a bear! That's why we're here! To see that bear! Where is it?
Botswana: An angry elephant on the road is no fun!
Argentina: Llama's are!
Iceland: why would we want to cross this? We didn't bring a boat ... Actually we did cross, as turning back would have meant a very long drive!