Plumeria flowers, Hawaii, United States (© Miranda Jans/Getty Images)

Striated heron on a Victoria water lily, Pantanal, Brazil (© Gerald Corsi/Getty Images)

The Milky Way framed by Double Arch in Arches National Park, Utah, United States (© Adventure_Photo/Getty Images)

Plaza de España, Seville, Spain (© Horia Merla/Getty Images)

Mount Burgess and Emerald Lake in Yoho National Park, British Columbia, Canada (© Feng Wei Photography/Getty Images)

An ultralight aircraft flying over the sands of Namibia (© Burt Johnson/Alamy Stock Photo)

Dunluce Castle, County Antrim, Northern Ireland (© DieterMeyrl/Getty Images)

Common chameleon (© Photostock-Israel/SPL/Getty Images)

Castildetierra in the Bardenas Reales, Navarre, Spain (© Eloi_Omella/Getty Images)

Leopard mother grooming her cub, Jao Reserve, Botswana (© Suzi Eszterhas/Minden Pictures)

An iris garden in Tokyo, Japan (© M.Arai/Getty Images)

Torres del Paine National Park, Patagonia, Chile (© Marco Bottigelli/Getty Images)

Porto Flavia, Sulcis-Iglesiente, Sardinia, Italy (© Marco Bottigelli/Getty Images)

Big Ben and Parliament, Palace of Westminster, London, England (© Puthipong Worasaran/Getty Images)

Great green macaw, Mexico (© Ondrej Prosicky/Shutterstock)

A delta in the Venetian Lagoon, Italy (© Dimitri Weber/Amazing Aerial Agency)

Pont St-Pierre across the Garonne River, Toulouse, France (© Image Professionals GmbH/Alamy)

Mount Hamilton, San Francisco Bay Area, California, United States (© Jeffrey Lewis/TANDEM Stills + Motion)

Honey bee on lavender flowers (© Anthony Brown/Alamy Stock Photo)

Tea garden at Yangjiatang Village, Songyang County, China (© feng xu/Getty Images)

Baobab trees at sunset, Avenue of the Baobabs, Madagascar (© Framalicious/Shutterstock)

A Julia butterfly on the nose of a yellow-spotted river turtle, Amazon Region, Ecuador (© Westend61/Getty Images)

Jotunheimen National Park in Norway (© Marisa Estivill/Shutterstock)

Butchart Gardens in Brentwood Bay, British Columbia, Canada (© 2009fotofriends/Shutterstock)

A train running along Hozugawa River in Arashiyama, Kyoto, Japan (© Alvin Huang/Getty Images)

Heidelberg, Baden-Württemberg, Germany (© anyaivanova/Getty Images)

Sea otter floating in a kelp bed in Alaska Maritime National Wildlife Refuge, United States (© Gerry Ellis/Minden Pictures)

Miravet on the Ebro river, Tarragona, Catalonia, Spain (© Eloi_Omella/Getty Images)

Little Pigeon River, Great Smoky Mountains National Park, Tennessee, United States (© GreenStock/Getty Images)

Knuthöjdsmossen nature reserve, Sweden (© Sven Halling/DEEPOL/plainpicture)