Visitors at the Vietnam Veterans Memorial in Washington, DC (© Nikki Kahn/Getty Images)

Wisteria blooms at Kawachi Fuji Gardens in Kitakyushu, Japan (© Wibowo Rusli/Alamy)

Ruff male displaying its plumage, Varanger Peninsula, Norway (© Winfried Wisniewski/Minden Pictures)

斯凯利格群岛（由斯凯利格·迈克尔岛和小斯凯利格岛组成），爱尔兰 (© Design Pics/DanitaDelimont.com)

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 Washington state (© Danita Delimont/Getty Images)

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

塞伦盖蒂国家公园里的斑马群，坦桑尼亚 (© pchoui/Getty Images)

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

Steamtown National Historic Site in Scranton, Pennsylvania (© Walter Bibikow/Danita Delimont)

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 (© 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)

Ghyakar村，尼泊尔上木斯塘 (© Frank Bienewald/Alamy)

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

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

The Copper River Delta in Chugach National Forest, Alaska (© Frans Lanting/plainpicture)

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

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

春天里的一只雄性开普梅莺 (© JZHunt/Getty Images Plus)

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

Mont Saint-Michel, France, for its annual marathon (© Leroy Francis/Getty Images)

Pollen-covered honey bee on a pumpkin flower (© Konrad Wothe/Minden Pictures)

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 Oregon’s Zumwalt Prairie (© Michael Durham/Minden Pictures)