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

Common terns sharing a small fish (© Ryzhkov Sergey/Shutterstock)

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

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

African elephants in Addo Elephant National Park, South Africa (© Robert Harding/Alamy)

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

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

Birdhouses hanging in a tree (© Westend61/Getty Images)

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

Kinkakuji temple in winter, Kyoto, Japan (© yoko_ken_chan/Shutterstock)

Sleeping Arctic fox (© Menno Schaefer/Getty Images)

Queen of the Andes plants with the Cordillera Blanca massif in the background, Peru (© Cyril Ruoso/Minden Pictures)

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)

Bastei Bridge above the Elbe River in Saxon Switzerland National Park, Germany (© Reinhard Schmid/eStock Photo)

Mist surrounding a forest in Munnar, Kerala, India (© Ahammed Riswan/EyeEm/Getty Images)

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

Tre Cime di Lavaredo as seen from the Lavaredo fork, Sexten Dolomites, Italy (© AWL Images/Danita Delimont)

Early morning frost on trees in Mount Siguniang National Park in Sichuan province, China (© Robert Harding World Imagery/Offset by Shutterstock)

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

Castlerigg Stone Circle near Keswick, Lake District, Cumbria, England (© Alan Copson/plainpicture)

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

Banded pipefish near Moalboal, Philippines (© Jenna Szerlag/Alamy)

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

Blue tit (left) and great tit in snowfall, Northern Vosges Regional Nature Park, France (© Michel Rauch/Minden Pictures)

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

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

Old Town of Lucerne, Switzerland (© Xantana/Getty Images)

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

Fireworks during a New Year's Eve celebration in Zaragoza, Spain (© Martina Badini/Shutterstock)