SEE THE SUB, BE THE SUB

Buy the sub. For just $78 million you can pick up the Phoenix 1000, a 213-foot "personal luxury submarine." Where? At U.S. Submarines, of course, the one-stop shop for rich people who love water:

Powered on the surface by twin turbocharged marine diesels, all of our luxury submarine models ... have extended surface range and are capable of diving to 305 meters (1000'). Bad weather? Simply close the hatch and dive, cruising effortlessly far below the waves in air conditioned comfort. The submarines' battery capacity and life support systems allow you to stay submerged for days at a time.

The Phoenix comes with "very large acrylic viewports." Like the Seaview, only with an acrylic deck saloon.