Fortress of Frederick II of Swabia, Castel del Monte, Andria, Western Murge, Barletta, Apulia, Italy, Europe

Southern right whale (Eubalaena australis) mother surfacing near whale watching boat in Argentina, South America

Stairs up to the third floor in the historic Desert View Watchtower at Grand Canyon South Rim, artwork created by Fred Kobotie in 1933, now owned by the National Park Service, UNESCO World Heritage Site, Arizona, United States of America, North America

Entrance to Bay of Bones Museum, Ohrid, Macedonia, Europe

Playground of Dokk1, by Schmidt Hammer Lassen Architects, Library and Citizens' Services on Urban Waterfront of Aarhus, Jutland Peninsula, Denmark, Europe

Guest from the Lindblad Expedition ship National Geographic Explorer licking ice in the Svalbard Archipelago, Norway, Arctic, Europe

German built WWII bunker at Oddesund, Thyholm Peninsula, Denmark, Europe

Student touching a statue in Daulatabad fort, Maharashtra, India

The 11th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

Alligators feeding, Gator Country Wildlife Adventure Park, Beaumont, Texas, United States of America

Snorkeler with golden jellyfish (Mastigias papua etpisoni), in Jellyfish Lake, a marine lake located on Eil Malk island, Rock Islands, Palau, Micronesia, Pacific

View of The Fram Museum, Bygdoynesveien, Oslo, Norway, Scandinavia, Europe

Alligators feeding, Gator Country Wildlife Adventure Park, Beaumont, Texas, United States of America

Young woman working at Gator Country Wildlife Adventure Park, Beaumont, Texas, United States of America

Lindblad Expeditions guests explore Cape Flora on Northbrook Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

A young killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, North America

Ruined cells of penal colony on Ile Saint-Joseph, Iles du Salut (Islands of Salvation), French Guiana, Overseas department and region of France, French Guiana, South America

View of The Fram Museum, Bygdoynesveien, Oslo, Norway, Scandinavia, Europe

Tourists at stone wall at archaeological site of Sacsayhuaman, UNESCO World Heritage Site, Cusco, Cusco Region, Peru, South America

Chinstrap penguin (Pygoscelis antarctica) breeding and molting at Half Moon Island, Antarctica, Southern Ocean, Polar Regions

Educational school trip at Prambanan Temple Compounds, UNESCO World Heritage Site, region of Yogyakarta, Java island, Indonesia, Southeast Asia, Asia

Students with teacher in coloured scarf in centre taking a dynamic pose during an educational school trip at Prambanan Temple Compounds, UNESCO World Heritage Site, region of Yogyakarta, Java island, Indonesia, Southeast Asia, Asia

Messner Mountain Museum (MMM), Kronplatz (Plan de Corones), Dolomites, near Brunico (Bruneck), South Tyrol (Alto Adige), Italy

Messner Mountain Museum (MMM), Kronplatz (Plan de Corones), Dolomites, near Brunico (Bruneck), South Tyrol (Alto Adige), Italy

LUMEN, Museum of Mountain Photography, Kronplatz (Plan de Corones), near Brunico (Bruneck), Dolomites, South Tyrol, Italy

A gir Tzutujil dressed in traditional costume, San Juan de la Laguna, Solol√°, Guatemala.