Owner: Andrey Melnichenko, Founder MDM Bank
Estimated Cost: $300 million
Russian billionaire Andrey Melnichenko's yacht looks more like a wartime submarine. And while the design may not be every ship admirer's cup of tea, it sure does Melnichenko well. The luxury vessel attracts an enormous amount of attention with its diesel engines and large fuel tanks designed for an extra-long voyage. But if you thought the price of filling up your gas tank was high, imagine fueling up A. Melnichenko reportedly spends $500,000 to fill the tank, according to The Wall Street Journal.
The super yacht houses six guest suites, three swimming pools and three speedboats.