Webster's Falls in autumn, Hamilton, Ont. (© Saffron Blaze/Getty Images)

Adult Cedar Waxwing (Bombycilla cedrorum) perched on a flowering Nootka Lupin (Lupinus nootkatensis), Great Bear Rainforest, B.C. (© Jack Chapman/Minden Pictures)

Smith Rock State Park, Oregon (© Manuela Durson/Getty Images)

Lujiazui Financial District, Shanghai, China (© Jackal Pan/Getty Images)

A bull stands in a field under the gaze of Mount Pico, Pico Island, Azores (© Atmo-Sphere/Getty Images)

Beaver dam in the Sawtooth National Forest, Idaho (© Charles Knowles/Alamy)

Reedy Island in Moneyboque Bay, Long Island, New York (© Claudia Uripos/eStock Photo)

A worker painting the Hammering Man, a sculpture by Jonathan Borofsky, in Frankfurt, Germany (© Arne Dedert/Alamy)

Valletta, Malta (© Deejpilot/GettyImages)

A bearded reedling in Elmley National Nature Reserve in Kent, England (© Mark Bridger/Offset by Shutterstock)

Huay Mae Khamin waterfall in Khuean Srinagarindra National Park, Thailand (© ImpaKPro/Getty Images)

Toronto skyline at sunset (© diegograndi/Getty Images)

Rocamadour, France (© Rrrainbow/Getty Images)

Sand dunes with Sangre de Cristo Mountains in the background, Great Sand Dunes National Park and Preserve, Colorado (© Tim Fitzharris/Minden Pictures)

Ruby-throated hummingbird feeding on yellow bells in the Texas Hill Country (© Rolf Nussbaumer/Danita Delimont)

Lifeguard shack at sunset on The Entrance beach, Central Coast, NSW, Australia (© Yury Prokopenko/Getty Images)

Guanajuato, Mexico (© AI NISHINO/Alamy)

Cranberry harvest seen from a drone, Vancouver (© Grant Faint/Getty Images)

Icelandic sheep ready for réttir (© Pieter Tytgat/Getty Images)

Sailboats in Warnemünde, Germany (© Rico Ködder/Getty Images)

Sea otter mother and newborn pup in Monterey Bay, California (© Suzi Eszterhas/Minden Pictures)

The Ship of Tolerance, an international art installation in Zug, Switzerland (© Linda Kennard/Alamy)

Hobbiton, near Matamata, North Island, New Zealand (© 500px Asia/Getty Images)

Golden ginkgo leaves at Xuanwu Lake Park in Nanjing, Jiangsu Province, China (© SIPA Asia/ZUMA Wire/Alamy)

Decorated cows for the Almabtrieb, where the cattle are led back from their alpine pasture, Tannheimer Tal, a valley in Tyrol, Austria (© Hans Lippert/Alamy)

Watkins Glen State Park's Rainbow Falls in the Finger Lakes region of upstate New York (© Kenneth Keifer/Alamy)

Fraser River east of Vancouver with the Golden Ears mountains (© LeonU/Getty Images)

Blue shark near the Azores in the North Atlantic Ocean (© Nuno Sa/Minden Pictures)

Steeply terraced vineyards of the Lavaux region on the shores of Lake Geneva, Switzerland (© Yves Marcoux/plainpicture)

A saturniid moth in Mole National Park in Larabanga, Ghana (© Robert Thompson/Minden Pictures)