Trilobis 65: Part Yacht, Part Submarine House.

Italian naval architect Giancarlo Zema dreamed big - really big when he designed a part yacht part submarine house called Trilobis 65:

At first glance, the Trilobis looks as if it would be more at home soaring into the sky than plying the waters of atolls, bays and maritime parks. Looking at a computer image of the bow conjures up visions of the flying saucers in 1950s science fiction films. The Trilobis's blueprints, however, reveal a nautical heritage that reaches back to the humble dugout while simultaneously embracing 21st century technologies that include high-strength composites and nonpolluting hydrogen fuels.

Jules Verne would be proud!

http://www.sub-find.com/trilobis65.htm