Sand dunes in the Sahara, Algeria (© AWL Images/DanitaDelimont.com)

Iceberg, Ross Sea, Antarctica (© Michel Roggo/Minden Pictures)

North Gate of Angkor Thom, Angkor Archaeological Park, Cambodia (© Amazing Travel Lifestyle/Shutterstock)

Castleton, Derbyshire, England (© Daveduke/Moment Open/Getty Images)

A mother cheetah and her cubs in the Masai Mara National Reserve, Kenya (© Scott Davis/Tandem Stills + Motion)

Neuschwanstein and Hohenschwangau Castles, Bavarian Alps, Germany (© Harald Nachtmann/Getty Images)

The Globe of Science and Innovation building, Meyrin, Switzerland (© Deyan Baric/Alamy)

Verdon Gorge, Provence-Alpes-Côte d'Azur, France (© Hemis/Alamy)

La Rocque Harbour, St. Clement, Island of Jersey (© Reinhard Schmid/Huber/eStock Photo)

Sandstone rock formations, Vermilion Cliffs National Monument, Arizona, USA (© Yva Momatiuk and John Eastcott/Minden Pictures)

Winter in Huangshan Mountains, China (© Hung Chung Chih/Shutterstock)

Reed bunting, Newport Wetlands, Wales (© Chris Howes/Wild Places Photography/Alamy Stock Photo)

Svolvaer, Lofoten Islands, Norway (© Roberto Moiola/Sysaworld/Getty Images)

Boreal owl, Saskatchewan, Canada (© Nick Saunders/Minden Pictures)

SantaPark in Rovaniemi, Lapland, Finland (© lukutin77/Getty Images)

Grand-Place, Brussels, Belgium (© Richard Taylor/Sime/eStock Photo)

Bohemian waxwings perched on a branch, Canada (© Jim Cumming/Shutterstock)

Capitol Reef National Park, Utah, USA (© Jeff Clay/Tandem Stills + Motion)

Christmas tree in Castle Square, Warsaw, Poland (© Panther Media GmbH/Alamy)

Val Gardena, Dolomites, Italy (© Ingus Kruklitis/Getty Images)

Ljubljana, Slovenia (© kasto80/Getty images)

Castlerigg Stone Circle, Lake District National Park, England (© John Finney Photography/Getty Images)

Chinstrap penguins, South Sandwich Islands, South Atlantic Ocean (© Jan Vermeer/Minden Pictures)

Town Hall Square, Tartu, Estonia (© Westend61/Getty Images)

Caribou running in snow, Alaska, USA (© Michael Quinton/Minden Pictures)

Princes Street, Edinburgh (© Andrew Merry/Moment/Getty Images)

Kirkjufell, Snæfellsnes peninsula, Iceland (© Ratnakorn Piyasirisorost/Getty Images)

Humpback whale, Disko Bay, Greenland (© Paul Souders/DanitaDelimont.com)

Hogmanay firework display, Edinburgh, Scotland (© The Travel Library/Shutterstock)

Daiichi Tadami River Bridge, Fukushima, Japan (© DoctorEgg/Getty Images)

Fireworks over Phra Nakhon Khiri, Phetchaburi, Thailand (© noomcpk/Shutterstock)