Silversea Cruises’ Silver Shadow is the equivalent of a floating luxury hotel, where you’ll find multiple restaurants, lavish suites, elegant public rooms, and just 391 traveling companions. The all-suite vessel, launched in 2000 as the line’s first Millennium-class ship and followed in 2001 by sister ship Silver Whisper, is also all-inclusive, so you can put your wallet in the safe when you board and still ask for another flute of rosé Champagne after dinner. This is a decadent way to traverse the globe, whether you’re transiting the Panama Canal or setting off on a four-month world cruise.