The 450 ft yacht costs $5 million a week to charter. The yacht is owned by Russian vodka magnate Yuri Scheffler. Gates is vacationing in Porto Cervo, Sardinia. Boasting not one, but two helicopter landing bads, because, let's face it one is never enough, The Serene can play host to 24 guests in 12 staterooms, which includes a master suite, one VIP stateroom, seven double cabins and three twin cabins. With 52 crew, The Serene also boasts a hanger for the helicopter, a seawater swimming pool, submarine hanger, a cinema and onboard WiFi. LUXURY FIT FOR A BILLIONAIRE: THE $5 MILLION-A-WEEK BOAT CHARTERED BY BILL GATES The Serene was built in 2011 for the owner of Stolichnaya vodka, Yuri Scheffler. She is 436ft long and comes complete with a sundeck that has a wet bar, a wood fire pizza oven and a Teppenyaki grill. She is capable of traveling 6,000 nautical miles on one tank of fuel, which is the same as traveling from London to New York and at least half way back again. Her most impressive feature are her two helipads, but the luuxrious yacht does not shirk on features. She also has an indoor climbing wall and a dedicated children's playroom to keep infants occupied. She also has a fully equipped spa and club and three external swimming pools and one indoors. Boasting an underwater viewing room, The Serene also has space or a large submarine able to reach a depth of more than 330 ft. The opulent yacht also has a gym, swimming pool and two jacuzzis on deck. The Serene also has a full library, health spa, underwater viewing room, nightclub and indoor climbing wall for the Microsoft billionaire and family to enjoy. It has a cruising speed of 15 knots and is able to travel 6000 nautical miles on a full tank - which is almost the distance from London to New York and back again. Indeed, the Gates family have been vacationing off the coast of Porto Cervo for years. Every August the coastal town off the coast of Sardinia becomes a literal billionaires playground. Originally owned by the Aga Khan, who bought up 50km of coastline almost as a private beach in the 1960s, Porto Cervo is now undergoing a mini-boom since he sold it to a consortium of bankers in the early part of the 21st century, It is where Princess Diana spent her final days before her fated trip to Paris. Former Italian prime minister Silvio Berlusconi and ex-British prime minister Tony Blair have spent time relaxing in the sun there. Now dotted with Louis Vuitton and Gucci stores, the coastline is the perfect spot for the richest man in the world to unwind. However, they may be the children of the world's richest man, but Rory, Jennifer and Phoebe probably should enjoy this vacation while they can - because their father is not leaving them any of his $76 billion fortune.