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.
The Burj Khalifa in Dubai, the world's tallest tower, has shut indefinitely after visitors were stranded on the observation deck at the top of the tower and had to make their way back down using a service elevator. Scary!
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