The sign marking the start of the wild wall at Mutianyu, a section I now fondly recall as The Dangerous Road. The words "Here be dragons" would have been equally effective, I think. And as it happens, I didn't have my safe on me, so I wasn't too worried about it.

You can see what's behind the sign in this picture, and there'll be more photos of The Dangerous Road on my sixth film, when I get round to uploading it.