'El Problema del Caballo' by Claudia Fontes in Venice, Italy (© Marco Secchi/Getty Images)

Ruff male displaying on Varanger Peninsula in Norway (© Winfried Wisniewski/Minden Pictures)

The installation 'Waldplastik' during Blue Night in Nuremberg, German (© Daniel Karmann/Shutterstock)

The Skellig Islands, Skellig Michael and Little Skellig, in Ireland (© Design Pics/DanitaDelimont.com)

San Miguel de Allende, Mexico (© ferrantraite/Getty Images)

Fireweed in North Cascades National Park in USA (© Danita Delimont/Getty Images)

Sand sculpture of Rabindranath Tagore at Golden Sea beach at Puri. (© ASIT KUMAR/AFP/Getty Images)

St. Mary Falls in Glacier National Park, Montana, USA (© Pung/Shutterstock)

Zebras in Serengeti National Park, Tanzania (© pchoui/Getty Images)

Hanging bridge near Manali (© ImagesofIndia/Shutterstock)

Historic windmills of Zaanse Schans near Amsterdam, Netherlands (© Matt Cooper/Gallery Stock)

Piping plover and its chick on Jones Beach Island, New York (© Vicki Jauron/Getty Images)

Pine Log State Forest, Florida, USA (© plainpicture/Cavan Images)

Cannes, France, where the annual film festival begins today (© Manjik Photography/Alamy)

Midnight sun at North Cape, Norway (© Ron Bennett/Shutterstock)

Abu Simbel temples on the west shore of Lake Nasser, Egypt (© George Steinmetz/Getty Images)

A carving of artist W.O.J. Nieuwenkamp in the Pura Meduwe Karang temple in Bali, Indonesia (© John Elk III/Getty Images)

The Garden of Silence, Chandigarh (© Karun Sharma/Hindustan Times/Getty Images)

Ghyakar village, Upper Mustang, Nepal (© Frank Bienewald/Alamy)

Island fox on Santa Cruz Island, Channel Islands National Park, California, USA (© Ian Shive/Tandem Motion + Stills)

The Copper River Delta in Wrangell-St. Elias National Park and Preserve, Alaska, USA (© Frans Lanting/plainpicture)

Green sea turtle with sardines near Playa Grandi Beach, Curaçao (© yfhishinuma/Getty Images Plus)

Sandcastle on Malvarrosa Beach in Valencia, Spain (© Tony French/Alamy)

Male Cape May warbler in spring (© JZHunt/Getty Images Plus)

Refreshing soda drinks at a stall in New Delhi (© Masterfile)

Pitting Gales Point, Pembrokeshire Coast National Park, west Wales (© Sebastian Wasek/Getty Images)

Sydney Opera House light beam projections during Vivid 2017 (© Taras Vyshnya/Alamy Stock Photo)

Stravinsky Fountain in Paris, France (© Alessandro Saffo/eStock Photo)

42nd Street with the Chrysler Building during Manhattanhenge in 2018, New York City (© Dennis Fischer Photography/Getty Images)

Prairie mounds at USA's Zumwalt Prairie (© Michael Durham/Minden Pictures)

The High Trestle Trail Bridge in central Iowa (© Kelly van Dellen/Getty Images Plus)