This extraordinary yacht by Gray Designs is 75-meters in size and decked out with the best of technology and design. Features a car showroom, retail space, entertaining room and a roof with built-in solar panels that double as a helicopter landing pad. On the engine side, it boasts a 630-horsepower V12 engine, making quick getaways a breeze. The only downside is that it can't submerge underwater as a submarine, or pull some other Inspector Gadget like nonsense, but that's probably coming in version two.

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