Amphitheatre of El Jem, Tunisia (© Westend61/Getty Images)

Emerald Lake, South Klondike Highway, Yukon, Canada (© artherng/Getty Images)

Start Point Lighthouse, South Devon, England (© Guy Edwardes/Minden Pictures)

Squirrel looking into the lens of a camera (© Alfredo Piedrafita/Getty Images)

‘Avatar Mountains,’ Zhangjiajie National Forest Park, China (© Amazing Aerial Premium/Shutterstock)

Giant sequoia trees in Sequoia and Kings Canyon National Parks, California (© lucky-photographer/Getty Images)

Overseas Highway in the Florida Keys (© Evgeny Vasenev/Cavan Images)

Piazza IX Aprile, Taormina, Sicily, Italy (© rudi1976/Alamy)

Tiny gecko on a leaf (© Darren Greenwood/Alamy)

Perseid meteor shower, Cottonwood Canyon State Park, Oregon (© Joshua Meador/Tandem Stills + Motion)