The Welsh Dragon outside Cardiff Castle (© Billy Stock/The Photolibrary Wales/Alamy)(Bing United Kingdom)

The Bernese Alps from Jungfraujoch railway station in Switzerland (© Markus Eichenberger Photo/Nimia)(Bing United Kingdom)

Saffrondrop bonnet mushrooms in Meerdaal, Belgium (© Danny Lap/Minden Pictures)(Bing United Kingdom)

A crater in Þingvellir National Park, Iceland (© Ragnar Th Sigurdsson/Alamy)(Bing United Kingdom)

The laurel trees of Madeira Natural Park, Portugal (© Frank Krahmer/Getty Images)(Bing United Kingdom)

A fallow deer (doe) with fawn at Helmingham Hall, Suffolk (© Paul Sawer/FLPA/Minden Pictures)(Bing United Kingdom)

Stars above, sea sparkle below in Oregon’s Cape Sebastian State Scenic Corridor (© David Pasillas/500px)(Bing United Kingdom)

A memorial wall to women in Konak, Izmir, Turkey (© Cem Oksuz/Getty Images)(Bing United Kingdom)

A mangrove forest near Palau (© WaterFrame/Alamy)(Bing United Kingdom)

Rolling hills and red earth in Dongchuan, China (© Praphat Rattanayanon/Getty Images)(Bing United Kingdom)

A strontium optical clock (© Andrew Brookes, National Physical Laboratory/Science Photo Library)(Bing United Kingdom)

A male pine warbler perched on an icy branch (© Rolf Nussbaumer Photography/Alamy)(Bing United Kingdom)

A grizzly in the Great Bear Rainforest, British Columbia, Canada (© Jack Chapman/Minden Pictures)(Bing United Kingdom)

‘The Globe’ sculpture by Joe Smith, Knockan Crag National Nature Reserve, Scotland (© Mar Photographics/Alamy)(Bing United Kingdom)

The Caldeirão on Corvo Island, Portugal (© Samuel Domingues/500px)(Bing United Kingdom)

A cricket stadium made from sand in Puri, Odisha, India (© Dinodia/age fotostock)(Bing United Kingdom)

The dome of the Reading Room of the National Library of Ireland in Dublin (© Cahir Davitt/plainpicture)(Bing United Kingdom)

An adolescent frog in a drop of water (© Adhi Prayoga/REX Shutterstock)(Bing United Kingdom)

The Azure Window natural stone arch near Dwejra Beach, Gozo, Malta (© SIME/eStock Photo)(Bing United Kingdom)

Early blooming crocus (© suterscher/iStock/Getty Images)(Bing United Kingdom)

Danum Valley Conservation Area, Sabah, Malaysia (© Steve Bloom Images/Alamy)(Bing United Kingdom)

Dynjandi Falls, Iceland (© Garret Suhrie/Tandem Stills + Motion)(Bing United Kingdom)

People celebrating Holi festival in India (© Peter Zelei/Getty Images)(Bing United Kingdom)

Dawn over the Fox River at De Pere, Wisconsin (© James G Brey/Shutterstock)(Bing United Kingdom)

Walrus swimming in the Arctic Ocean (© Fabrice Simon/Corbis)(Bing United Kingdom)

San Juan de Gaztelugatxe, Bermeo, Basque Country, Spain (© Mimadeo/Shutterstock)(Bing United Kingdom)

Baby feral domestic rabbit, Ōkunoshima Island (aka Rabbit Island), Hiroshima, Japan (© Yukihiro Fukuda/Minden Pictures)(Bing United Kingdom)

Hot springs in Dallol, Ethiopia (© Kazuyoshi Nomachi/Corbis)(Bing United Kingdom)

Detail of the Messe Basel Exhibition Hall in Basel, Switzerland (© View Pictures/REX Shutterstock)(Bing United Kingdom)

West Bow in Edinburgh, Scotland (© Rory McDonald/Getty Images)(Bing United Kingdom)

Sunrise over The Cobb, Lyme Regis, Dorset (© Adam Burton/robertharding/Getty Images)(Bing United Kingdom)