Imagine a 3ft height difference, a 53-year age gap, or falling for a neighbor. These are just some stories of the world's most unique couples. Who are these fascinating duos?

Key Moments:

• 00:00  8. The Gentle Giant
• 01:30  7. Godfrey & Kate
• 02:28  6. Twin Hearts
• 03:25  5. Man & Machine
• 04:43  4. Love Without Limits
• 05:55  3. The Lucky Couple
• 06:47  2. Brawn & Beauty
• 07:37  1. Tall & Small

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