Bill Gates treats his family to a Mediterranean vacation on board a 450-ft superyacht complete with a submarine, 12 state rooms and a helicopter to fly them to and from tennis

Bill Gates vacations exactly like you would imagine the richest man in the world should.

First up a relaxing game of tennis in the morning before being helicoptered - not ferried - back to the superyacht you and your family have chartered to the tune of $5 million-a-week.

Then, an exuberant jet ski around the $330 million boat with wife Melinda and children Rory, Jennifer and Phoebe, moored off the billionaires playground of Porto Cervo, Sardinia.

The Microsoft founder and philanthropist - worth $76 billion - has taken time away from his busy schedule to relax with his family - renting The Serene, the 436ft yacht of Stolichnaya vodka magnate, Yuri Scheffler, as a luxurious base.