A boat cruises on the River Douro, past the Ribeira District, UNESCO World Heritage Site, Porto, Douro, Portugal, Europe

Views of cruise ships in Port of Barcelona from the Montjuic Castle old military fortress on Montjuic Mountain overlooking the city, Barcelona, Catalonia, Spain, Europe

Views of cruise ships in Port of Barcelona from the Montjuic Castle old military fortress on Montjuic Mountain overlooking the city, Barcelona, Catalonia, Spain, Europe

Avila Jupiter tug supply vessel ship in the harbour, city of Bergen, Norway, Scandinavia, Europe

Cruise ship anchoring below Pia glacier, Tierra del Fuego, Chile, South America

Cruise ships, Bridgetown Port, Barbados, West Indies, Caribbean, Central America

Bed room cabin inside Paul Gauguin cruise in Papeete harbour. Tahiti, French Polynesia, Papeete's harbour, Tahiti Nui, Society Islands, French Polynesia, South Pacific.

Paul Gauguin cruise staff anchored in Fakarava, Tuamotus Archipelago French Polynesia, Tuamotu Islands, South Pacific.

Low loading truck bringing mermaid motor pod, attaching the mermaid motors, dry dock, Queen Mary 2, Saint-Nazaire, France

Welding steel plates, dry dock, Queen Mary 2, Saint-Nazaire, France

Huge factory floor, dry dock, Queen Mary 2, Saint-Nazaire, France

Tug boat navigating the newly launched Celebrity Equinox from the Meyer Werft along the River Ems, Lower Saxony, Germany

Tug boat navigating the newly launched Celebrity Equinox from the Meyer Werft along the River Ems, Lower Saxony, Germany

Tug boat navigating the newly launched Celebrity Equinox from the Meyer Werft along the River Ems, Lower Saxony, Germany

Queen Mary in dry dock, Queen Mary 2, Saint-Nazaire, France

Cutting machine for steel plates, dry dock, Queen Mary 2, Saint-Nazaire, France

Cruise line at the coast of Big Island, Hawaii, USA

Inner fjord of Kiel with a cruise ship and the HDW shipyard, state capital of Kiel, Schleswig-Holstein, Germany, Europe

View over the city of Kiel towards the inner fjord with a cruise ship and a Stena Line ferry, Schleswig-Holstein, Germany, Europe

Shipwrecked World Discoverer cruise in tropical waters of the Solomon Islands, Roderick Bay; Nggela Islands, Solomon Islands

Wind breaks on cruise ship entering College Fjord in Glacier Bay National Park and Preserve, Alaska, United States of America

Semi-Trailer Truck

Grand Princess Cruise Ship moored along the coastline of Lahaina, Maui, Lahaina, Maui, Hawaii, United States of America

View of anchored vessels in Kailua Bay through a grove of coconut palm trees (Cocos nucifera) growing on the well-manicured Hulihee Palace grounds in Kailua-Kona, the Big Island, Hawaii, USA during the summer. The large cruise vessel is the Norwegian Crui

Silhouette of a cruise ship on the water off the shore of Kailua Bay at sunset, Kailua-Kona, Island of Hawaii, Hawaii, United States of America

An Atlantis submarine cruises by the MS Pride of America, a Norwegian Cruise Line vessel, and lifeboats anchored off Kailua-Kona, the Big Island, Hawaii, USA during the summer, Island of Hawaii, Hawaii, United States of America

Star of Honolulu making a sunset cruise viewed from Magic Island, Ala Monana beach park, Honolulu, Oahu, Hawaii, United States of America

Silhouette of a cruise ship on the water off the shore of Kailua Bay at sunset, Kailua-Kona, Island of Hawaii, Hawaii, United States of America

Cruise Ship, Caribbean

Cruise Ship, Caribbean