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

Misty peak of Glamaig, Red Hills, Isle of Skye (© fotoVoyager/Getty Images)

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

Mount Pico on Pico Island, the Azores (© Atmo-Sphere/Getty Images)

A bull in the foothills of Mount Pico on Pico Island in the Portuguese archipelago of the Azores (© Atmo-Sphere/Getty Images)

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

Mann Island buildings, Canning Dock, Liverpool (© Borislav Zlatkov/EyeEm/Getty Images)

Valletta, Malta (© Deejpilot/GettyImages)

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

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

Purple and pink heather on heathland near Studland, Dorset (© allou/iStock/Getty Images Plus)

Rocamadour, Lot, France (© Rrrainbow/Getty Images)

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

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

Ruby-throated hummingbird feeding on yellow bells, Texas, USA (© Rolf Nussbaumer/Danita Delimont)

The Mayflower II replica of the original Mayflower (© Jim Curran/Adobe Stock)

Aerial view of vineyards in La Geria, Lanzarote, Canary Islands, Spain (© Orbon Alija/Getty Images)

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

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

Sea otter mother and newborn pup in Monterey Bay, California, USA (© 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, Tannheimer Tal, a valley in Tyrol, Austria (© Hans Lippert/Alamy)

Tigh Mor and Loch Achray surrounded by fog, Perthshire (© Fortunato Gatto/Sime/eStock Photo)

Watkins Glen State Park's Rainbow Falls, upstate New York, USA (© Kenneth Keifer/Alamy)

Fraser River east of Vancouver, British Columbia, Canada (© LeonU/Getty Images)

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)

Lantern display celebrating the Mid-Autumn Festival in Singapore (© Khin/Getty Images)