Silversea has four ships in its expedition fleet: Silver Cloud, Silver Explorer, Silver Origin, and Silver Wind.
The Adventure Part: Passengers can embark on zodiac tours to get ashore on rocky areas in the Galapagos to see boobies or bask in the views from the comfort of their stateroom aboard an Antarctica cruise.
The Luxe Part: Cruises on Silversea are all-inclusive: Everything from excursions to drinks is part of the fare. The ships are comfortable, too. Marble suites feature showers decked-out with rainfall showerheads. Plus, there's a spa, beauty salon, a fitness center, and even afternoon tea.