Giant sequoia trees in Sequoia and Kings Canyon National Parks, California (© lucky-photographer/Getty Images)

Climber on Denali, Denali National Park, Alaska (© Andrew Peacock/Tandem Stills + Motion)

Sandstone butte in Capitol Reef National Park, Utah (© Amazing Aerial Premium/Shutterstock)

Zelenci Nature Reserve, Slovenia (© Andrey Danilovich/Getty Images)

Tintern Abbey, Wales (© matthibcn/Getty Images)

Atlantic puffin, Iceland (© Peter Hering/Minden Pictures)

Kagami-ike (Mirror Pond), Nagano, Japan (© Shoji Fujita/Getty Images)

Bodie Island Lighthouse, Nags Head, North Carolina (© Michael Ver Sprill/Getty Images)

Highways in Taipei, Taiwan (© Tavarius/Shutterstock)

Indigenous artwork, Ngaruwanajirri Art Centre, Wurrumiyanga, Bathurst Island, Australia (© Robert Wyatt/Alamy)

A lion in Maasai Mara, Kenya (© Scott Davis/Tandem Stills + Motion)

'Gateway Pool' art installation at Jupiter Artland sculpture park, Edinburgh, Scotland (© Owen Humphreys/PA Images/Alamy)

Elephant family in Amboseli National Park, Kenya (© Ibrahim Suha Derbent/Getty Images)

Perseid meteor shower, Cottonwood Canyon State Park, Oregon (© Joshua Meador/Tandem Stills + Motion)

Tiny gecko on a leaf (© Darren Greenwood/Alamy)

Piazza IX Aprile, Taormina, Sicily, Italy (© rudi1976/Alamy)

Overseas Highway in the Florida Keys (© Evgeny Vasenev/Cavan Images)

'Avatar Mountains,' Zhangjiajie National Forest Park, China (© Amazing Aerial Premium/Shutterstock)

Squirrel looking into the lens of a camera (© Alfredo Piedrafita/Getty Images)

Start Point Lighthouse, South Devon, England (© Guy Edwardes/Minden Pictures)

Emerald Lake, South Klondike Highway, Yukon, Canada (© artherng/Getty Images)

Amphitheatre of El Jem, Tunisia (© Westend61/Getty Images)

Skógafoss waterfall, Iceland (© Maridav/Shutterstock)

Shark Fin Cove, Davenport, California (© Jeff Lewis/Tandem Stills + Motion)

Lower Yellowstone Falls, Yellowstone National Park, Wyoming (© Tim Fitzharris/Minden Pictures)

Berlin Cathedral and Museum Island, Berlin, Germany (© Rudy Balasko/Shutterstock)

Seongsan Ilchulbong, a tuff cone on Jeju Island, South Korea (© Quynh Anh Nguyen/Getty Images)

Fort Lovrijenac, West Harbor, Dubrovnik, Croatia (© Benny Marty/Shutterstock)

American bison in Grand Teton National Park, Wyoming (© Enrique Aguirre Aves/Getty Images)

Whale shark, Ningaloo Reef, Western Australia (© Jason Edwards/Getty Images)

Saguaro cacti, Ironwood National Monument, Arizona (© Jack Dykinga/Minden Pictures)