4. Wintergarden, Seabourn
A glass-enclosed solarium with a whirlpool and a daybed make this 1,097-square-foot suite on the Seabourn Odyssey (and its sister ships) downright sexy. When you're not relaxing amid the modern Scandinavian interior decor — enjoying such nice touches as fresh orchids in the bathroom — or on your private balcony, accept the invitation from the ship's master for a bridge visit. The suite also has a stocked bar, an espresso machine and free Wi-Fi. Sample price: $11,399 per person for a weeklong cruise of the Dalmatian Coast and Greek Isles.

5. Owner's Suite, Oceania Marina
This trendy, 2,000-square-foot oasis is done up in Ralph Lauren Home furnishings, with a custom-made ebony baby grand piano as the centerpiece of the ocean-view entertainment room. A professional-grade entertainment system is equipped to play 3-D movies. In the living room curl up under a cashmere lap blanket. Outdoors, lounge in the whirlpool on your private veranda. For those who can't pack light, there are even his-and-her walk-in closets. Sample price: $12,111 per person for a seven-day Greece and Turkey cruise.

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