3. dubai

Passing hands from the Sultan of Brunei to Sheikh Mohammed bin Rashid, the ruler of Dubai, this prestigious superyacht is famed for its decadent interiors. price: US$400 million Best for: Frustrated interior designers

Boys toys: Besides the abundance of sunbathing areas, Jacuzzis and swimming pools, the interior features a stunning circular staircase with glass steps that change colour as the light enters from the top deck.