Taking conspicuous consumption to new...ahem..depths, U.S. Submarines manufactures submersible watercraft for the ridiculously wealthy. Check out the Phoenix 1000:
For a cool 78 million clams, you could have your very own. Torpedoes not included (I think...).
For a cool 78 million clams, you could have your very own. Torpedoes not included (I think...).