Earlier this week, we yearned to join the ranks of the superwealthy who own private submarines. But that booming luxury market is soon to be submerged (zing) by the condo cruise market. As per the Real Deal, the Four Seasons is selling units in their first all residential ship called, boringly, the Ocean Residences.

The problem with personal submarines is that they're too inconspicuously consumptive. Really it's only the sea urchins who can marvel at your wealth, and they're poor anyway. Stupid urchins.

But living aboard a 719-foot ship with a bolted-down grand piano and floor-to-ceiling windows, one doesn't encounter that problem so much. Units start from $825,000 for a tiny studio— which, when you think about the Manhattan real estate market, is a deal—to a 3,242 sq. ft. penthouse for $7.3 million (plus 500K in yearly fees). Pricey—but someone's got to pay for the Anya Hindmarch diamond crusted seasickness bags!

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