Guests aboard the Lindblad Expeditions ship National Geographic Explorer, South Atlantic Ocean

Polar bear (Ursus maritimus) and tourists aboard eco-tourism ship. Spitzbergen, Polar High Arctic, North Atlantic.

Tourists aboard the Dale Princess, Martins Haven, Pembrokeshire, Wales, UK, Europe

Tourists aboard the Dale Princess, Martins Haven, Pembrokeshire, Wales, UK, Europe

Golden waitress Maria aboard cruise ship MS Deutschland, Reederei Peter Deilmann, South Pacific Ocean, near Chile, South America

MS Bremen, wooden deck, Aboard MS Bremen Cruise Ship, Hapag-Lloyd Kreuzfahrten, Germany

Deck seen from Royal Clipper crow's nest platform, Aboard Sailing Cruiseship Royal Clipper (Star Clippers Cruises), Mediterranean Sea, near Ponza, Pontine Islands, Italy

Guests enjoy champagne and canapes in Kaisersaal ballroom aboard cruise ship MS Deutschland, Reederei Peter Deilmann, South Pacific Ocean, near Chile, South America

Fine Dining in MS Bremen Restaurant, Aboard MS Bremen Cruise Ship, Hapag-Lloyd Kreuzfahrten, Germany

Royal Clipper full sail seen from platform of crow's nest, Aboard Sailing Cruiseship Royal Clipper (Star Clippers Cruises), Adriatic Sea, near Kotor, Montenegro

Royal Clipper Atrium Dining Room, Aboard Sailing Cruiseship Royal Clipper (Star Clippers Cruises), Mediterranean Sea, near Sicily, Italy

Fine Dining in MS Bremen Restaurant, Aboard MS Bremen Cruise Ship, Hapag-Lloyd Kreuzfahrten, Germany

Chairs and tables on sundeck aboard Rhine river cruise ship, MS Bellevue, TC Bellevue, TransOcean Kreuzfahrten, Eltville On The Rhine River, Rheingau, Hesse, Germany

MS Bremen Cruising Smooth North Sea Waters, Aboard MS Bremen Cruise Ship, Hapag-Lloyd Kreuzfahrten, Germany

Woman holds champagne glass aboard cruise ship MS Astor (Transocean Kreuzfahrten), MR, Kiel, Schleswig-Holstein, Germany

Man climbing up the mast of the Royal Clipper, Mastclimbing, Aboard Sailing Cruiseship Royal Clipper (Star Clippers Cruises), Adriatic Sea, near Kotor, Montenegro

Sunlit sculpture aboard cruise ship MS Deutschland

Prosecco welcome reception aboard the Arosa passenger ship Riva, Austria

Passengers aboard cruiseship MS Deutschland (Reederei Peter Deilmann), Kiel, Schleswig-Holstein, Germany

Aboard the Capt. Khlebnikov icebreaker steering through sea ice off the coast of Franklin Island, Antarctica

Cabin aboard Fram ship at Fram Museum on Bygdoy Peninsula, Oslo, Norway, Scandinavia, Europe

Aboard the Capt. Khlebnikov icebreaker, icebergs, Antarctica