2. AZZAM

It might not be the world’s most expensive superyacht, but it is the biggest. At 590 feet long, little is known about this German-designed yacht except that its interior is a sumptuous assembly of Empire-period bling. price: US$650 million

Best for: Middle Eastern potentates

Boys toys: Powered by two gas turbines and two diesel engines, she boasts an impressive 94,000 horsepower and a top speed in excess of 30 knots. You’ll never be embarrassed at the lights in this superyacht.