Michigan Princess Riverboat, Grand Ledge

At 222 feet long and 88 feet high, the Players Riverboat Casino II wouldn't fit on parts of the upper Mississippi River. So when it had to leave its Louisiana home for a new job in Detroit, it took the long way there, passing around Florida, Maine, and Nova Scotia until it chugged through the Gulf of St. Lawrence. All this was just the beginning of the boat's journey—the next step was a thorough transformation from a scrapped gambling vessel into an opulent cruise ship. The staff gussied up its interior, installed several kitchens, and gave it a new royal title: the Detroit Princess Riverboat.

Today, the Detroit Princess is a coveted venue for high-energy celebrations and relaxing cruises alike. Its five tiers of outdoor decks afford dual skyline views of Detroit and Windsor and up-close glimpses of the Ambassador Bridge, the crucial link that keeps Canada from floating away. Inside each of the boat's four stories, passengers can visit a full bar and socialize inside heated and air-conditioned rooms. The biggest of these boast dining areas anchored by prime-rib buffets and sprawling dance floors where DJs or live Motown groups prompt guests to boogie down. Holiday parties, late-night excursions, and private charters take the nightclub vibe to the water, and floating wedding ceremonies and receptions let even the merfolk branch of the family be a part of the fun.