Rub' al Khali desert on the border of Oman and the Emirate of Dubai (© Daniel Schoenen/Offset by Shutterstock)

Barley field in East Lothian, Scotland (© Scott Masterton/plainpicture)

Upper Cathedral Valley, Capitol Reef National Park, Utah, USA (© Tim Fitzharris/Minden Pictures)

Castel del Monte, Apulia, Italy (© Toni Spagone/Alamy)

Clouded leopard (© Dhritiman Mukherjee/Alamy)

The Pinnacles on the Isle of Purbeck in Dorset, England (© James Osmond/Alamy)

Salisbury Crags in Holyrood Park, Edinburgh, Scotland (© Andrew Merry/Getty Images)

Salar de Uyuni, Bolivia (© John Shaw/Minden Pictures)

Elizabeth Quay Bridge, Perth, Australia (© Amazing Aerial Agency/Offset by Shutterstock)

The Mine Bay Māori Rock Carving of Ngatoroirangi by Matahi Whakataka-Brightwell on Lake Taupo, North Island, New Zealand (© Evgueni Zverev/Alamy)

Nahanni National Park Reserve, Northwest Territories, Canada (© Robert Postma/Getty Images)

Perseid meteor shower photographed at the Dinosaur Museum of Erenhot in Inner Mongolia, China (© bjdlzx/Getty Images)

Pont Valentré bridge, Cahors, France (© Reinhard Schmid/Huber/eStock Photo)

Horned ghost crab, Grand Anse, Praslin island, Seychelles (© Ingo Schulz/Offset by Shutterstock)

Ubehebe Crater in Death Valley National Park, California, USA (© Albert Knapp/Alamy)

Petit Minou Lighthouse, Brittany, France (© Mathieu Rivrin/Getty Images)

Shambhala roller coaster, PortAventura Park, Salou, Tarragona, Spain (© Joaquim F. P./Getty Images)

Stairway to Heaven trail, Wawayanda State Park, New Jersey, USA (© Leembe/Getty Images)

The Old Town of Dubrovnik, Croatia (© Jeremy Woodhouse/Getty Images)

Giant manta ray and a photographer off the Ningaloo Coast, Australia (© Shutterstock Premier)

Waterfall in Amboli, Maharashtra, India (© ePhotocorp/iStock/Getty Images Plus)

Olympic Coast National Marine Sanctuary, Washington state, USA (© Chris Moore/Tandem Stills + Motion)

Little blue heron in Cuba (© Sergey Uryadnikov/Alamy)

A surfboard fence near Paia, Maui, Hawaii (© Matt Anderson Photography/Getty Images)

Angels Window on the North Rim of the Grand Canyon, Arizona, USA (© Tim Fitzharris/Minden Pictures)

A sea swallow and blue button in Coffs Harbour, New South Wales, Australia (© Gary Bell/Minden Pictures)

Casa do Penedo, Portugal (© Olimpio Fantuz/eStock Photo)

Red-billed oxpeckers on an impala, Mpumalanga, South Africa (© Heini Wehrle/Minden Pictures)

Ruskeala Mountain Park, Karelia, Russia (© Konstantin Trubavin/Offset by Shutterstock)

Mount Mayon, Philippines (© Per-Andre Hoffmann/Cavan)

Đurđevića Tara Bridge, Montenegro (© Hike The World/Shutterstock)