Think you're a well-mannered person? Most people do and so they might be, at home. But the most apparently harmless gestures and customs the thumbs-up sign, a casual greeting, certain types of gifts can be radically misconstrued on foreign soil, with embarrassing or even dangerous consequences.
Just remember: never shake hands with a Ukrainian in a doorway and never ever make the okay sign to a Greek.
Don't say we didn't warn you! Here's our essential guide to all sorts of unintended ways to offend your foreign friends.