Forest path in Great Smoky Mountains National Park, Tennessee (© putmanphoto/Getty Images)

Flock of Swaledale sheep in North Yorkshire, England (© R A Kearton/Getty Images)

Methoni Castle, Messenia, Greece (© Andrew Mayovskyy/Shutterstock)

Hammock camping on a lake in Central Florida (© Mac Stone/Tandem Stills + Motion)

Wooden fishing boats at Kendwa, Zanzibar, Tanzania (© Lubos Paukeje/Alamy)

The moon (© Victor Blum/Getty Images)

A young jaguar on a riverbank, Pantanal, Brazil (© Tambako the Jaguar/Getty Images)

Coral reef in the Indian Ocean, Mayotte, France (© Gabriel Barathieu/Minden Pictures)

Medieval city of Rothenburg ob der Tauber, Germany (© kanuman/Getty Images)

The Neolithic settlement of Skara Brae, Orkney, Scotland (© Paul Williams - FunkyStock/Getty Images)