Trullo buildings in Alberobello, Apulia, Italy

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Calcite Springs Overlook and Yellowstone River, Yellowstone National Park, Wyoming

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European fallow deer, England

© Enrique Aguirre Aves/Getty Images

St. Barbara's Cathedral, Kutná Hora, Czechia

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Rolling hills of the Palouse, Washington

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Wheatear and flowering heather, Peak District National Park, England

© Ben Hall/Nature Picture Library

The citadel in Bonifacio, Southern Corsica, France

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Solar Impulse 2 at Kalaeloa Airport, Honolulu, Hawaii

© Solar Impulse/Revillard/Sipa/Shutterstock