It has a mosaic swimming pool, circular staircase, and helipad. $440 million: Andrey Melnichenko also owns Sailing Yacht A, which resembles a military-style submarine. It has three swimming pools ...

6. The 295-foot yacht, called the Moonstone, fits just over 12 people. It comes with a swimming pool, gym, hot tub, spa, movie theater, and helicopter pad. You can even customize the light display ...