Skyline along the Douro River, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of Oslo city skyline from The Fram Museum, Bygdoynesveien, Oslo, Norway, Scandinavia, Europe

Ferry service on the Aurlandsfjord, an arm of the Sognefjord, the largest fjord in all of Norway, Vestland, Norway, Scandinavia, Europe

Woman hiker looks out from Rubha Hunish Coast Guard lookout bothy to the Shiant Isles and Harris at this northernmost tip of Skye, an SSSI due to its geology and maritime cliffs, Rubha Hunish, Duntulm, Skye, Inner Hebrides, Scotland, United Kingdom, Europe

Bristol Packet Boat Trips sign at the Floating Harbour, Bristol, England, United Kingdom, Europe

Pier and VOC Ship Amsterdam Replica and NEMO Science Museum, Amsterdam, The Netherlands

Little boat between the icebergs of the Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Zodiac in the Arctic desert in Dunes harbour, Devon island, Nunavut, Canadian Arctic, Canada, North America

Harbour Inlet, Floating Harbour, Bristol, England, United Kingdom, Europe

View of the Grand Canal from the rooftop terrace of the Fondaco dei Tedeschi, Rialto, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

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

Titanic Museum, Belfast, Ulster, Northern Ireland, United Kingdom, Europe

The Bristol Harbour Railway, Bristol, England, United Kingdom, Europe

Rabelo Boats on the River Douro, Porto, Portugal, Norte, Portugal, Europe

Huge seas and waves in a Beaufort scale 10 storm in the seas between the Falkland Islands and South America, South America

Cruise ship anchoring in Wulaia Bay, Tierra del Fuego, Chile, South America

Ferry at a jetty, Anfi del Mar Resort, Playa de la Verga, Arguineguin, Gran Canaria, Canary Islands, Spain, Atlantic, Europe

Lobster pots, Tingwall, near Kirkwall, Mainland, Orkney Islands, Scotland, United Kingdom, Europe

Stern view of HMS Trincomalee, British Frigate of 1817, at Hartlepool's Maritime Experience, Hartlepool, Cleveland, England, United Kingdom, Europe

Parade of sailing ships during Kiel Week 2006, Kiel Fjord, Schleswig-Holstein, Germany

Winderjammer Parade at Kieler Woche 2008 with German sail training vessel and command ship Marine Gorch Fock and further traditional sailing vessels, Kiel Fjord, Schleswig-Holstein, Germany, Europe

Parade of windjammers at the Kieler Woche 2008, Kiel Week 2008 with the sail training ship Gorch Fock of the German navy as the command ship and other traditional sailing ships, Kiel Fjord, Schleswig-Holstein, Germany, Europe

Winderjammer Parade at Kieler Woche 2008 with German sail training vessel and command ship Marine Gorch Fock and further traditional sailing vessels, Kiel Fjord, Schleswig-Holstein, Germany, Europe