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.

Celebrity Cruises offers three ships that cruise to the Galapagos: The 48-passenger Celebrity Xpedition, the 16-passenger Xploration, and the new, 100-passenger Celebrity Flora. 

The Adventure Part: Go ashore and traipse among the blue-footed boobies, iguanas, turtles, sea lions, and pelicans. Peer over the side of your Zodiac as you patrol the clear waters and view schools of colorful reef fish throughout the archipelago. Adventure guides and naturalists lead the voyage, which includes snorkeling, beach walking, and swimming.

The Luxe Part: Recipes are crafted by a Michelin-starred chef using locally sourced ingredients including sustainable seafood. Tuckered out from a day of snorkeling? Order room service in your stylish stateroom. 

Lindblad has a fleet of 15 expedition ships that reach every corner of Earth, from the Amazon, the Caribbean, Patagonia, Europe, Asia and beyond.

The Adventure Part: The line's National Geographic collaboration has been in effect since 2004, providing top-notch scientists and naturalists as guides and you'll find expert instruction on how to shoot better wildlife photos. Excursions include kayaking, stand-up paddleboarding, snorkeling, hiking, Zodiac tours, and diving.

The Luxe Part: The ships feature lounges, pools, and spas offering body treatments, facials, and foot massages.

The French-owner luxury mega-yacht line features expedition itineraries that cruise everywhere from the Arctic to Papua New Guinea.  

The Adventure Part: Naturalist guides lead Zodiac tours where you can admire fjords or spot polar bears and other wildlife among the ice floes. Alternatively, head to Papua New Guinea or embark on one of the line's signature Tropical Expedition voyages.

The Luxe Part: These ships have spa services, fitness centers, and pools, as well as a modern clean aesthetic. Plus, if you book a suite, you get a butler. Can't afford that? Don't worry: Everyone gets 24-hour room service, upscale bath products, and haute French cuisine.

Cruise in style with Seabourn Cruise Line, which is offering two new ships: Seabourn Venture (launching 2022) and Seabourn Pursuit (launching in 2023). 

The Adventure Part: Expedition leaders curate your journey, leading you on kayaking tours along pristine shorelines. Wildlife spotting is incredibly popular -- and for good reason.

The Luxe Part: Both vessels offer two custom-built submarines, 24 zodiacs, and kayaks. The 26-person expert team is there to guide, educate, and inform. The high-end staterooms and sleek public spaces are added bonuses.