Admiral X Force Amenities
Source: Admiral Yachts

The Most Extravagant Yachts on the Water

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Admiral X Force Amenities
Source: Admiral Yachts

Come Sail Away

Boating is considered a luxury activity. Even consumer boats are expensive, and that's not even factoring in maintenance. However, just like with any other vehicle, there are over-the-top yachts, often called superyachts, where the wealthy more than outdo the weekend sailor with what we'll quaintly call extravagance (um, more than one yacht on this list has a defense system). We looked at 10 of the most expensive yachts on the water, inside and out, plus their most outrageous amenities.

Related: Cars That Cost More Than a Million Dollars

Pelorus
Source: Charter World

Pelorus

Estimated price: $300 million
The Pelorus has changed many hands, including those of mega-yacht owners Roman Abramovich and David Geffen, who upgraded to even bigger boats on this list. The latest owner is Samuel Tak Lee, who captains the 377-foot yacht, which he (or, we assume, someone he hires) literally does via joystick.

Pelorus Interior
Source: Charter World

Pelorus Interior

The Pelorus' interior feels like an "informal beach house." Terence Disdale designed the wood paneling to look natural and distressed, even though it was manufactured specifically for Pelorus. A total of 22 guests can stay in 11 cabins, including the master and two VIP rooms, plus 41 crew to serve them.

Pelorus Amenities
Source: Charter World

Pelorus Amenities

The top deck has two pools, and the sea-level transom opens onto a platform from which to launch water toys or just lounge by the ocean. It was Abramovich who added the second helipad, for the billionaire who needs room for more than one helicopter. Pelorus also features stabilization systems at sea and at anchor, for smooth sailing that is common for most of the yachts on this list. Many yachts have movie theaters, but the one onboard the Pelorus includes beds.

Dubai
Source: Platinum Yachts

Dubai

Estimated price: $300 million
Previously named Platinum, Panhandle and Golden Star, the name Dubai suits this 532-foot yacht valued at $350 million. Built for Brunei Prince Jefri Bolkiah, the Dubai now belongs to Sheik Mohammed Rashid Al Maktoum of the United Arab Emirates.

Dubai Interior
Source: Platinum Yachts

Dubai Interior

Make your way up and down the Dubai's seven decks — one of them with an air-conditioned enclosure, perfect for UAE's hot climate — on the yacht's magnificent circular staircase, where the glass changes color as you step. You've heard of red carpet? Here you can sit on gigantic, circular red sofas.

Dubai Amenities
Source: Charter World

Dubai Amenities

Most yachts have swimming pools, but what other yacht turns the swimming pool into a work of art? Al Maktoum's guests can open their eyes underwater to see the pool's beautiful mosaic. Other parts of Dubai also feature a mix of tile materials — gold leaf, marble, onyx, lazuli, and malachite — to create a work of art everywhere you walk.

Related: 18 of the Most Luxurious Cruise Ships

Radiant
Source: Charter World

Radiant

Estimated price: $320 Million
Emirati businessman Abdulla Al Futtaim bought the Radiant from Russian media billionaire Boris Berezovsky. Reportedly worth $320 million and originally named Darius, it's easy to see how this 361-foot superyacht earned the name Radiant when you see it lit up at night.

Radiant Interior
Source: Charter World

Radiant Interior

Al Futtaim has kept photographers out of Radiant's cabins, but we know it can host 20 guests in 10 cabins, plus 44 crew. The decks are made of teak, and designer Tim Heywood used a large beam to leave the interior wide open.

Radiant Amenities
Source: Charter World

Radiant Amenities

When Berezovsky was designing the boat, he included an "escape launch," a turbo-charged twin diesel speed boat that can shoot him out of the Radiant at 75 knots. You've got to wonder who he thought he needed to escape from, but we're sure Al Futtaim can sleep easier on the sea knowing it's there. It also has sonic guns and a water cannon that fires up to 100 yards — you know, for protection.

Motor Yacht A
Source: Charter World

Motor Yacht A

Estimated price: $323 Million
Russian fertilizer and coal magnate Andrey Melnichenko owns this 390-foot yacht. It may look like a submarine, but it doesn't submerge. This motor yacht (not to be confused with Melnichenko's sailing yacht) includes bomb-proof glass, which is apparently the sort of thing billionaires need to think about. At least it served him well until he listed it for sale in 2016, although there didn't seem to be any takers — Melnichenko still owns it.

Motor Yacht A Interior
Source: Charter World

Motor Yacht A Interior

Designer Philippe Starck wanted to create a wide open space, so the main deck of Motor Yacht A is a single saloon across the length of the interior — that's what's under that long submarine nose. Starck used Baccarat-crystal tables and polished silver on the interior, as well as bathroom faucets reportedly worth $40,000 and bannisters worth $60,000. Fourteen guests can join Melnichenko in seven cabins, but only Melnichenko's fingerprint can open his room. There's also room for around 40 crew members.

Motor Yacht A Amenities
Source: Charter World

Motor Yacht A Amenities

The A's three swimming pools manufacture currents for swimming upstream, like an underwater treadmill. One of those pools has a glass floor so you can look up at swimmers from the deck below. Starck's favorite spot is reportedly the tender garage, the place on a yacht that houses smaller boats and other billionaire toys. On Motor Yacht A, these get their own luxurious cabins, just like the human guests.

Serene
Source: Charter World

Serene

Estimated price: $330 million
The Stoli vodka empire afforded Yuri Shefler this yacht, but he sold it to then-deputy Saudi Arabian Crown Prince Mohammad bin Salman in 2015 for $458 million after only a few years of sailing. You can see all 440 feet of the Serene glowing neon turquoise in the pitch black sea at night.

Serene Interior
Source: Charter World

Serene Interior

Bill Gates once paid $5 million for a week on this yacht with his family. Fifteen suites can host up to 24 guests, with more than twice as many crew members to serve them. Dine well onboard Serene using the wood-fired pizza oven and Teppanyaki grill. Each area is a circular design by Reymond Langton, incorporating pure white, wood and leather, and the occasional chandelier.

Serene Amenities
Source: Charter World

Serene Amenities

There are pleasures for kids and grownups on the Serene. Kids have their own playground with a climbing wall, and they can slide down to lower decks. Swimmers can choose between either hot or cold jacuzzis and, if they want to get up close and personal with the marine life, they can visit the Nemo room for an underwater view.

Yacht A+
Source: Yacht Charter Fleet

Yacht A+

Estimated price: $527 million
Formerly known as Topaz, the $527 million A+ certainly makes the grade at 482 feet long and eight decks tall. Owned by United Arab Emirates Sheikh Mansour bin Zayed Al Nahyan, the flag flown by A+ represents the Cayman Islands.

Yacht A+ Interior
Source: Yacht Charter Fleet

Yacht A+ Interior

The A+ hosts 62 guests between 26 cabins with further capacity for 79 crew members. During its Topaz days in 2014, Leonardo DiCaprio hosted a party with 80 guests that included other celebrities like Jamie Foxx and Orlando Bloom. The number 80 was apropos because it was reportedly an '80s-themed party, with DiCaprio in a velour pantsuit. With friends like these, who needs a yacht? Well, Al Nahyan has both.

Yacht A+ Amenities
Source: Yacht Charter Fleet

Yacht A+ Amenities

For entertainment, the emphasis seems to be on relaxation with an outdoor bar and sunbathing space dominating the decks. A library, massage room, observation lounge, and the owner's study also suggest quiet time, although there is also a gym, movie theater, beauty salon, and dance floor for less contemplative activities.

Rising Sun
Source: Charter World

Rising Sun

Estimated price: $590 million
When you create Geffen Records and co-create Dreamworks, you can have a $590 million yacht like David Geffen. But the Rising Sun didn't get to dock at Cannes until Geffen bought it from Oracle CEO Larry Ellison. Nor did it host Oprah before Geffen was there to invite her yachting.

Rising Sun Interior
Source: Charter World

Rising Sun Interior

Forty five crew members vastly outnumber the potential 16 guests. A movie theater seems obvious for a movie executive, and there's also a gym, because all those celebrities love to stay in shape. The decks they relax on are made of teak with onyx counters.

Rising Sun Amenities
Source: Charter World

Rising Sun Amenities

Ah ha, the real reason Geffen needed a yacht: the wine cellar! What good is an impressive wine collection if you can't take it out to sea? The Rising Sun also has a basketball court, and guests had better watch those air balls because there's no getting a foul ball back from the drink. The court also doubles as a helipad — because of course it does.

Azzam
Source: Charter World

Azzam

Estimated price: $605 million
Abu Dhabi Emir Sheikh Khalifa bin Zayed Al Nahyan owns this 590-foot yacht, which cost approximately $605 million to make (though some current estimates put its value around $400 million). Though it's the largest yacht on the water, it's not the most expensive. But for a boat that big, the ability to sail 30 knots or more makes it fast and furious.

Azzam Interior
Source: Charter World

Azzam Interior

Al Nahyan keeps the interior of his yacht private, but we know its 18 cabins can host 36 guests, plus 20 crew members. The interior, designed by Christophe Leoni, is described as a relaxed French Empire style. and it's rumored that Azzam has a bullet-proof master cabin, as you do.

Azzam Amenities
Source: Charter World

Azzam Amenities

You can see at least six decks from the photos, which leaves plenty of room for a gym, spa, swimming platform, helipad, and more. Reportedly, Azzam's water desalination drinking-water system runs on waste heat from the engine to make it environmentally friendly.

Eclipse
Source: Charter World
Eclipse Interior
Source: Charter World

Eclipse Interior

Terence Disdale designed the interior with teak and silver — actual silver — rubbed into the grain of the black wood walls. The bottom level makes the ship go round with the engine room, but it also gets the groove on with a disco.

Eclipse Amenities
Source: Charter World

Eclipse Amenities

Anchor stabilizers keep the motion in the ocean smooth for guests relaxing in their cabins, working out in the gym, watching a movie in the theater, or getting pampered in the salon. There are pools on two levels, and, though the Eclipse is nine decks tall, only eight are really functional since the top deck belongs to parking space for two helicopters (a third can be stored in a hangar below the foredeck.) Rather go down than up? The Eclipse has that covered, too, with its own submarine.

Admiral X Force
Source: Charter World

Admiral X Force

Estimated price: $1 billion
At an estimated 476 feet — about the length of two jumbo jets — the still-in-concept, $1 billion X Force will cost roughly $2.1 million per foot when completed. It looks like a sleek bullet from the outside, with long glass windows that are designed for seeing out than in. And, with 360-degree exterior lights, the X Force will be a beacon in the nighttime sea.

Admiral X Force Interior
Source: Admiral Yachts

Admiral X Force Interior

With a master stateroom of 180 feet, that only leaves 295 feet for everyone else, but the guest rooms aren't too shabby, and there is still room for indoor gardens and fireplaces. The double-height interiors will allow for palatial grand halls with marble floors and spiral staircases wrapped around shimmering crystal chandeliers.

Admiral X Force Amenities
Source: Admiral Yachts

Admiral X Force Amenities

Most superyachts have swimming pools, but the X Force's double-decker beach club seems like more than a pool. Its blue light will envelop swimmers in its watery aura, and sleek, in-pool bar stools will allow guests more interested in lounging than swimming to stay dry. Doubles seem to be the order of the amenities, because that's only one of two pools, plus there are plans for two movies theaters, two helipads, and more than one gym, too.