When you're far from home, even what you'd assume to be the most universal gesture might mean something completely different than you'd expect. It's a concept explored in the book Don't Get Me Wrong! The Global Gestures Guide (http://www.dontgetmewrong.co.uk/), with pictures by Florian Bong-Kil Grosse.
For example, in Turkey this gesture is a positive, upbeat physical expression that means "beautiful" or "good".
Explore this Life slideshow and find out more about global gestures.