The power of smell is a strange thing – you probably don't even associate it with travel. When you think of adventures you think of beautiful landscapes and amazing flavours and the warmth of sun on bare skin. You rarely even consider the things you smell. This is such a subconscious sense, a pleasure you sometimes don't even realise you're taking. And yet it's a powerful driver of memory, perhaps the most powerful of all. Think about it. You might not be able to name the fragrance an ex-girlfriend or boyfriend used to prefer, but if someone walks past wearing it now you know it immediately. You're transported straight back to that relationship (for better or worse).