Sailing stone at Racetrack Playa in Death Valley National Park, California, USA (© Patrick Walsh/Getty Images)

Isola Bella, Lake Maggiore, Piedmont, Italy (© Massimo Ripani/eStock Photo)

Aerial view of blue and white parasols on the coast of Rhodes, Greece (© Amazing Aerial Agency/Offset by Shutterstock)

White-tailed doe and fawn in Wisconsin, USA (© Karel Bock/Shutterstock)

Oyster farm offshore from Notojima Island, Ishikawa Prefecture, Japan (© divedog/Shutterstock)

Former lifeguard station on the island of Rügen, Mecklenburg-Western Pomerania, Germany (© DR pics/Shutterstock)

Cribyn viewed from Pen y Fan, Brecon Beacons National Park, Powys (© Adam Burton/Alamy Stock Photo)

Infinity Bridge in Stockton-on-Tees (© Robert Smith/Alamy)

Little owl (Athene noctua) perched on sunflower, Cádiz, Andalusia, Spain (© Andres M. Dominguez/Minden Pictures)

Lion cubs hiding in tall grass in the Kalahari Desert, Botswana (© Jami Tarris/Getty Images)

Bioluminescent sea fireflies along the shore of Okayama, Japan (© tdub_video/Getty Images)

Fossil of a Tyrannosaurus rex skeleton (© Corbin17/Alamy)

Cavern in Pictured Rocks National Lakeshore on Lake Superior, Michigan, USA (© Kenneth Keifer/Getty Images)

Monument Valley Navajo Tribal Park, between Arizona and Utah, USA (© AWL Images/Danita Delimont)

Young humpback whale giving its mother a hug off the coast of Tonga (© Biosphoto/Alamy)

An adult burrowing owl emerges from its burrow at sunset in Davis, California, USA (© Neil Losin/Tandem Stills + Motion)

Borobudur in Central Java, Indonesia (© Oleh Slobodeniuk/Getty Images)

Panoramic view of Lulworth Cove at sunset, Dorset (© Adrian Baker/Shutterstock)

A group of curious Emperor penguins in Antarctica (© Mint Images Limited/Alamy)

A winding road by a glacial river in the Highlands of Iceland (© Kevin Krautgartner/Offset by Shutterstock)

South Stack Lighthouse and coastal wildflowers at sunset, Anglesey (© Alan Novelli/Alamy Stock Photo)

Urquhart Castle and Loch Ness in the Scottish Highlands (© AWL Images/Danita Delimont)

Stars reflecting in Totensee, a mountain lake at Grimsel Pass, Kanton Bern, Switzerland (© magodevita/Getty Images)

The Caño Cristales river in the Serranía de la Macarena mountains of Colombia (© Jorge Iván Vásquez Cuartas/Getty Images)

Zion National Park, Utah, USA (© pabradyphoto/Getty Images)

Spotted Lake in the Okanagan region of British Columbia, Canada (© Galyna Andrushko/Shutterstock)

Château d'If in Marseille, France (© Boris Stroujko/Shutterstock)

Bicycle sculptures at the Col d'Aubisque, Hautes Pyrenees, France (© Fco. Javier Sobrino/age fotostock)

Hay bales in a field in Jutland, Denmark (© Nick Brundle Photography/Getty Images)

Sunlight piercing a forest in Garajonay National Park, La Gomera, Spain (© Martin Siepmann/Westend61/Offset by Shutterstock)

Pencils on display at Faber-Castell in Stein, Bavaria, Germany (© Rüdiger Hess/geo-select FotoArt)