The 11 most expensive yachts in the world

It has become normal for the world’s wealthiest individuals to drop millions, even billions, on lavish superyachts.

Oil Sheikhs and Russian tycoons alike are spending their holidays on massive yachts with swimming pools, basketball courts, and even concert halls.

Scroll down to see 11 of the most expensive yachts:

$200 MILLION: Microsoft co-founder Paul Allen owns a 414-foot yacht dubbed the Octopus. It has 41 suites and cost a whopping $200 million to build. The Octopus comes with a pool, two helicopters, and a movie theatre. If that's not enough, there's also a basketball court and recording studio.

$250 MILLION: Qatar's former Prime Minister, Hamad bin Jassim bin Jaber Al Thani, owns the Al Mirqab -- a luxury yacht that can accommodate 24 people. The yacht won the Motor Yacht of the Year award in 2009. It has two VIP suites that each come with a bathroom, living room, and double bedroom.

$256 MILLION: The Dilbar is the world's largest yacht by gross tonnage at 15,917 tons (over 31 million pounds). It was built for Alisher Usmanov, a Russian billionaire. The Dilbar has two helipads, an indoor swimming pool, and 3,800 square meters of living space.

$400 MILLION: The gigantic Dubai yacht measures 532 feet and is currently owned by Sheikh Mohammed bin Rashid Al Maktoum, the Vice President and Prime Minister of the UAE and Emir, or ruler, of Dubai. The superyacht features a mosaic swimming pool, circular staircase, and helipad. It can fit 24 guests overnight.

$590 MILLION: David Geffen, a billionaire entertainment mogul, owns the Rising Sun. but he originally shared it with Larry Ellison, the founder of Oracle. The 454-foot superyacht comes with a basketball court and can fit 18 guests. In April, Geffen hosted the Obamas on the megayacht.

$600 MILLION: The Azzam yacht is the world's biggest private superyacht. No one knows the owner, but many speculate it is owned by the royal family of Abu Dhabi. It reportedly has its own submarine with a missile defence system.

$4.8 BILLION: The History Supreme was made with solid gold and is the most expensive yacht in the world. It was reportedly sold to an anonymous Malaysian businessman in 2011. It comes with a glass-covered atrium for dining.

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