Bill Gates and his family are vacationing aboard a luxury 450-foot yacht off the coast of Sardinia . On board, apart from 12 luxurious suites, there is a seawater pool, a cinema, a nightclub, a climbing wall, a library, a spa and a gym. Charter costs $5 million a week, a mere trifle for a man whose fortune is estimated at $76 billion. The boat is equipped with a helicopter pad ready to bring the Microsoft founder to the Porto Cervo Club tennis courts at any time. Besides a helicopter, the boat is also supplied with a submarine for diving to the seabed. However, it is possible to admire the deep sea fauna in more comfortable conditions in the special observation cabin of the yacht.