Northern lights and wild reindeer on the tundra in Norway (© Anton Petrus/Getty Images)

Cove of Spires in Kenai Fjords National Park, Alaska, USA (© Sekar B/Shutterstock)

Christmas Market in Main Square of Braşov, Romania (© Alpineguide/Alamy)

Tête de Gorgias (left) and Roche Grande (background), near Entraunes, Alpes-Maritimes, France (© aerial-photos.com/Alamy)

The village of Benasque, Huesca, Spain (© Miscelleneoustock/Alamy)

Elevated path in Plitvice Lakes National Park, Croatia (© Alessandro Laporta/Offset by Shutterstock)

Elevated path in Plitvice Lakes National Park, Croatia (© Alessandro Laporta/Offset by Shutterstock)

Rocca Calascio in Abruzzo, Italy (© Francesco Russo/eStock Photo)

Bletchley Park bombe code cracking decryption machine, United Kingdom (© Louis Berk/Alamy)

Sleeping Arctic fox (© Menno Schaefer/Getty Images)

Dark clouds over the Western Ghats, Pune (© Shantanu Magdum/EyeEm/Getty Images)

Poinsettia leaf close-up (© Charles Floyd/Alamy)

Gornergrat railway station and the Matterhorn in Zermatt, Switzerland (© coolbiere photograph/Getty Images)

Pine grosbeak (© Peter Lilja/Getty Images)

Pine grosbeak (© Peter Lilja/Getty Images)

Ludwig van Beethoven sculptures and monument at the Münsterplatz, Bonn, Germany (© dpa/Alamy Live News)

The English National Ballet's 2016 production of 'The Nutcracker' at the London Coliseum in London, England (© Robbie Jack/Corbis via Getty Images)

Snowy Norway spruce forest at sunset, Thuringia, Germany (© Frank Sommariva/ImageBROKER/Offset by Shutterstock)

Basilica of Bom Jesus, the most famous church of Old Goa (© Cindy Miller Hopkins/DanitaDelimont.com)

Mountain goat kid in western Montana, USA (© Donald M. Jones/Minden Pictures)

Mountain goat kid in western Montana (© Donald M. Jones/Minden Pictures)

Castlerigg stone circle near Keswick, Lake District, Cumbria, United Kingdom (© Alan Copson/plainpicture)

Holiday lights on Cape Neddick Light in York, Maine (© Walter Bibikow/Alamy)

Colourful Christmas stars on sale in a market in Kerala (© Santosh Varky/Alamy Stock Photo)

Families play on the snow-covered slopes at Barnett Demesne Park, Belfast, Northern Ireland (© Stephen Barnes/Alamy)

Nabana no Sato garden at night in Kuwana, Japan (© Zoonar GmbH/Alamy)

Canada lynx in Montana, USA (© Alan and Sandy Carey/Minden Pictures)

Canada lynx in Montana (© Alan and Sandy Carey/Minden Pictures)

Winter in Bryce Canyon National Park, Utah, USA (© Don Paulson/Danita Delimont)

New Year's Eve fireworks at the Gateway of India, Mumbai (© INDRANIL MUKHERJEE/AFP via Getty Images)

Polar bear in waters off Svalbard, Norway (© Westend61/Getty Images)