Lençóis Maranhenses National Park in Barreirinhas, Brazil (© Rudi Sebastian/plainpicture)(Bing United States)

Lençóis Maranhenses National Park in Barreirinhas, Brazil (© Rudi Sebastian/plainpicture)(Bing United States)

Bird’s-eye view of the Golden Gate Bridge, San Francisco, California (© Alex Menendez/Aurora Photos)(Bing United States)

Bird’s-eye view of the Golden Gate Bridge, San Francisco, California (© Alex Menendez/Aurora Photos)(Bing United States)

Red squirrel in Cairngorms National Park, Scotland (© SCOTLAND: The Big Picture/Minden Pictures)(Bing United States)

Red squirrel in Cairngorms National Park, Scotland (© SCOTLAND: The Big Picture/Minden Pictures)(Bing United States)

Yellow-eyed penguins at Katiki Point, Moeraki, New Zealand (© Richard Robinson/Aurora Photos)(Bing United States)

Yellow-eyed penguins at Katiki Point, Moeraki, New Zealand (© Richard Robinson/Aurora Photos)(Bing United States)

Old Town in Prague, Czech Republic (© Frank Chmura/age fotostock)(Bing United States)

Old Town in Prague, Czech Republic (© Frank Chmura/age fotostock)(Bing United States)

Entoloma hochstetteri mushroom at Lake Mahinapua, New Zealand (© Thysje Arthur/Offset)(Bing United States)

Entoloma hochstetteri mushroom at Lake Mahinapua, New Zealand (© Thysje Arthur/Offset)(Bing United States)

Train crossing the Tadami River near the village of Mishima in Japan (© Nuttapoom Amornpashara/Getty Images)(Bing United States)

Train crossing the Tadami River near the village of Mishima in Japan (© Nuttapoom Amornpashara/Getty Images)(Bing United States)

Lionfish swimming off the coast of Indonesia (© David Fleetham/Visuals Unlimited, Inc.)(Bing United States)

Lionfish swimming off the coast of Indonesia (© David Fleetham/Visuals Unlimited, Inc.)(Bing United States)

Dr. Martin Luther King, Jr. Memorial in Washington, DC (© Raymond Boyd/Getty Images)(Bing United States)

Dr. Martin Luther King, Jr. Memorial in Washington, DC (© Raymond Boyd/Getty Images)(Bing United States)

Sanday Island and the North Sea, Scotland (© Jim Richardson/Getty Images)(Bing United States)

Sanday Island and the North Sea, Scotland (© Jim Richardson/Getty Images)(Bing United States)

Fire-damaged forest near Wolf Creek Pass, Colorado (© Peter Essick/Aurora Photos)(Bing United States)

Fire-damaged forest near Wolf Creek Pass, Colorado (© Peter Essick/Aurora Photos)(Bing United States)

Al-Khazneh in Petra, Jordan (© Felix Lipov/Shutterstock)(Bing United States)

Al-Khazneh in Petra, Jordan (© Felix Lipov/Shutterstock)(Bing United States)

Bow Bridge in Central Park, New York City (© Ultima Gaina/iStock/Getty Images Plus)(Bing United States)

Bow Bridge in Central Park, New York City (© Ultima Gaina/iStock/Getty Images Plus)(Bing United States)

Weaverbird nests hanging from acacia tree in Samburu National Reserve, Kenya (© Bernd Rohrschneider/Minden Pictures)(Bing United States)

Weaverbird nests hanging from acacia tree in Samburu National Reserve, Kenya (© Bernd Rohrschneider/Minden Pictures)(Bing United States)

Great Fountain Geyser, Yellowstone National Park, Wyoming (© lightpix/iStock/Getty Images Plus)(Bing United States)

Great Fountain Geyser, Yellowstone National Park, Wyoming (© lightpix/iStock/Getty Images Plus)(Bing United States)

Gardens by the Bay nature park, Singapore (© Hemis/Alamy Stock Photo)(Bing United States)

Gardens by the Bay nature park, Singapore (© Hemis/Alamy Stock Photo)(Bing United States)

Stelvio Pass in the Italian Alps (© Sandro Bisaro/Getty Images)(Bing United States)

Stelvio Pass in the Italian Alps (© Sandro Bisaro/Getty Images)(Bing United States)

Sea otter with pup, Prince William Sound, Alaska (© AlaskaStock/Masterfile)(Bing United States)

Sea otter with pup, Prince William Sound, Alaska (© AlaskaStock/Masterfile)(Bing United States)

Bohemian waxwings in Kuusamo, Finland (© Markus Varesvuo/Minden Pictures)(Bing United States)

Bohemian waxwings in Kuusamo, Finland (© Markus Varesvuo/Minden Pictures)(Bing United States)

Cho Gyeong-chul Observatory with star trails, Gangwon Province, South Korea  (© Multi-bits/ImaZinS/Getty Images)(Bing United States)

Cho Gyeong-chul Observatory with star trails, Gangwon Province, South Korea (© Multi-bits/ImaZinS/Getty Images)(Bing United States)

Sauna on Monte Lagazuoi in the Dolomites of Italy (© Spotcatch/Westend61/Offset)(Bing United States)

Sauna on Monte Lagazuoi in the Dolomites of Italy (© Spotcatch/Westend61/Offset)(Bing United States)

Tartan fabric on a loom in Edinburgh, Scotland (© AA World Travel Library/Alamy)(Bing United States)

Tartan fabric on a loom in Edinburgh, Scotland (© AA World Travel Library/Alamy)(Bing United States)

Mama polar bear and cubs in Manitoba’s Wapusk National Park, Canada (© Matthias Breiter/plainpicture)(Bing United States)

Mama polar bear and cubs in Manitoba’s Wapusk National Park, Canada (© Matthias Breiter/plainpicture)(Bing United States)