Black bear cub in a pine tree, Jasper National Park, Alberta, Canada (© Donald M. Jones/Minden Pictures)

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)

圣米格尔·德阿连德，墨西哥 (© ferrantraite/Getty Images)

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)

圣克鲁斯岛上的一只岛屿灰狐，加利福尼亚州海峡群岛国家公园 (© Ian Shive/Tandem Motion + Stills)

Königstein Fortress, near Dresden, Saxon Switzerland, Saxony, Germany (© Gunter Kirsch/Alamy Stock Photo)

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 (© Manjik Photography/Alamy)

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

山毛榉树林里的蓝铃花，英国赫特福德郡 (© Dan Tucker/Alamy)

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)

Sea Cliff Bridge, near Sydney, Australia (© Nick Fox/Alamy)

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

Cathedral Grove in MacMillan Provincial Park, B.C., Canada (© Robert Postma/Shutterstock)

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

Mont Saint-Michel, France (© Leroy Francis/Getty Images)

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

Fog along the coast, Newfoundland, Canada (© Scott Leslie/Minden Pictures)

2018年曼哈顿悬日期间的克莱斯勒大厦与42号街，纽约市 (© Dennis Fischer Photography/Getty Images)

俄勒冈州Zumwalt Prairie的草原土墩 (© Michael Durham/Minden Pictures)

爱荷华州中部的高架栈桥 (© Kelly van Dellen/Getty Images Plus)