Sun Voyager sculpture by Jón Gunnar Árnason in Reykjavik, Iceland (© Martin Child/Getty Images Plus)

The High Trestle Trail Bridge in central Iowa (© Kelly van Dellen/Getty Images Plus)

Bass Rock in Scotland’s Firth of Forth (© Richard Shucksmith/Minden Pictures)

It’s our birthday too, yeah! Harbor seal pup lying on the beach, Heligoland, Germany (© Fotofeeling/Westend61/Offset)

Date palm groves near Zagora, Morocco (© Frans Lemmens/Getty Images)

The tree canopy in the Tambopata National Reserve of the Peruvian Amazon (© Patrick Brandenburg/Tandem Stills + Motion)

Remains of Mulberry Harbour from the D-Day invasion, Arromanches les Bains, Normandy, France (© Javier Gil/Alamy)

Advancetown lake and forest, Gold Coast, Queensland, Australia (© AzmanL/E+/Getty Images)

Biorocks growing coral off the Gili Islands, Indonesia (© fenkieandreas/Getty Images Plus)

Crown Fountain, by Catalan artist Jaume Plensa, in Millennium Park, Chicago, Illinois (© imageBROKER/Alamy)

Ponta da Piedade rock formations off the coast of Algarve, Portugal (© David Santiago Garcia/Offset)

Cracking Art installation at Le Mans Cathedral in 2015, Le Mans, France (© Michel GILE/Gamma-Rapho via Getty Images)

Rio Grande and Sierra del Carmen Mountains in Big Bend National Park, Texas (© Grant Ordelheide/Tandem Stills + Motion)

The Great Elephant from Machines of the Isle of Nantes, France (© Dutourdumonde Photography/Shutterstock)

Prothonotary Warbler (protonotaria citrea) in Ontario (© Bill Coster/Minden Pictures)

Street art from the Pasadena Chalk Festival 2013, Pasadena, California (© WENN US/Alamy)

Male African lion and cub in Kgalagadi Transfrontier Park in southern Africa (© Richard Du Toit/Minden Pictures)

The Crystal Bridges Museum of American Art in Bentonville, Arkansas (© Eddie Brady/Getty Images)

Burgundy snails, also called edible snails (© Heidi and Hans-Juergen Koch/Minden Pictures)

Aerial view of the cherry laurel maze in Glendurgan Garden, Cornwall, England (© Richard Cooke/Alamy)

Sunset over the Great Sandhills, Sask. (© Robert Postma/plainpicture)

Aerial of the Amazon River Basin near Manaus, Brazil (© Art Wolfe/Danita Delimont)

Gnomesville in the Shire of Dardanup, Australia (© Amanda Hughes/Alamy)

Fleur de Lis on a railing at Golden Square Mile, Montreal (© Keith Levit/Alamy Stock Photo)

Sutherland Falls and Lake Quill in New Zealand (© Michael Rathmayr/plainpicture)

Glastonbury Tor and St Michael's Tower in England for the start of the Glastonbury Festival (© Spraggon Photography/Getty Images Plus)

Living root bridge in India (© dhritipurna/Shutterstock)

Montreux and Lake Geneva in Switzerland (© Westend61/Getty Images)

Close-up of chairlift during sunrise in Mt Hotham, Victoria (© VMJones/iStock/Getty Images Plus)

Fireflies surround a sea almond tree in Camarines Sur, Luzon, Philippines (© Jurgen Freund/Minden Pictures)