Azaleas in bloom at Magnolia Plantation and Gardens, Charleston, South Carolina, USA (© Joanne Wells/Danita Delimont)

Fairy chimneys and cave dwellings in Uçhisar, Cappadocia, Turkey (© Ivan Kmit/Alamy)

Spectral tarsiers in a ficus tree in Tangkoko Batuangus Nature Reserve, Indonesia (© Ondrej Prosicky/Shutterstock)

Divers at El Pit Cenote, located in Dos Ojos Natural Park, Quintana Roo, Mexico (© Christia Vizl/Tandem Stills + Motion)

Saguaro cactus flowers, Coronado National Forest, USA (© Jack Dykinga/Minden Pictures)

Male mountain bluebird in Yellowstone National Park, USA (© Jason Savage/Tandem Stills + Motion)

Bird's-eye view of Bronte Baths ocean pool outside Sydney, Australia (© Shay Cooper/Media Drum World/Cavan Images)

The Joan of Arc Monument at Riverside Park in Manhattan (© Chase Guttman/Alamy)

Wandering albatross pair, South Georgia island (© David Tipling Photo Library/Alamy)

Brightly-coloured powder for sale during Holi season (© Max Bauerfeind/Shutterstock)

Polar bear cubs looking out of their den in Wapusk National Park in Manitoba, Canada (© Robert Harding/Alamy)

Aerial view of Siesta Beach, Siesta Key, Florida, USA (© Julie Palermo/Getty Images)

Blooming cherry trees in Jerte Valley, Province of Cáceres, Spain (© Westend61/Getty Images)

Sunrise at Angkor Wat in Cambodia (© Sergio Diaz/Getty Images)

Portrait of poet Pablo Neruda projected on building, Santiago, Chile (© Mario Tellez/Anadolu Agency/Getty Images)

Women climbing a stepwell near Amber Fort in Jaipur, Rajasthan (© Shanna Baker/Offset)

Lenticular clouds over Mount Rainier, Washington, USA (© Delrious/Shutterstock)

European bee-eaters in the Extremadura region in Spain (© Martin Demmel/Offset)

Preparation of Gudi Padwa festival in Mumbai, Maharashtra (© Praful Gangurde/Hindustan Times via Getty Images)

Aerial view of the Big Sur coastline near Monterey, California, USA (© Blue Planet Archive/Alamy)

Azaleas in bloom at Magnolia Plantation and Gardens, Charleston, South Carolina (© Joanne Wells/Danita Delimont)

A European crested tit weathers a storm in Scotland (© Ben Hall/Minden Pictures)

A European crested tit weathers a storm in Scotland (© Ben Hall/Minden Pictures)

At the Kistefos Museum's sculpture park in Norway, The Twist bridges the Randselva River via a multipurpose walkway (© Laurian Ghinitoiu)

Common chia elephant (Loxodonta laprofolis) in stealth stance, Marakele National Park, Limpopo, South Africa (© Staffan Widstrand/Minden Pictures)