The Mati Si (Horse's Hoof Temple) and grottoes of Mati Si Scenic Area, Gansu province, China (© Ana Flašker/Alamy)

View towards the Church of Saint-Cirq-Lapopie, Lot Valley, Departement Lot, Occitania, Way of St. James, Via Podiensis, France (© Reinhard Schmid/Huber/eStock Photo)

Brown bear in the Brooks River, Katmai National Park, Alaska, USA (© littleting/Pradthana Jarusriboonchai/Getty Images)

Montage of images of Jupiter and its volcanic moon Io (© NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Goddard Space Flight Center)

Emperor penguin adults and chicks at the Snow Hill Island rookery, Antarctica (© Martin Ruegner/Getty Images)

Yuncheng Salt Lake in Yuncheng, Shanxi Province, China (© Xinhua/Alamy)

Cape Barren Goose (Cereopsis novaehollandiae) standing in a flowering meadow, Tasmania (© blickwinkel/Alamy Stock Photo)

Blanket octopus in Palm Beach, Florida, USA (© Steven Kovacs/Minden Pictures)

Honey Bee on Pea flower, Muogamarra Nature Reserve, NSW (© RugliG/iStock/Getty Images Plus)

Aerial view of American flamingos flying over Los Roques Archipelago National Park, Venezuela (© Cristian Lourenco/Getty Images)

Geghard Monastery, Armenia (© traumlichtfabrik/Getty Images)

Red fox in the Netherlands (© Wim Weenink/Minden Pictures)

Dragonfly fossil, about 150 million years old, in Solnhofen, Bavaria, Germany (© Ingo Arndt/Minden Pictures)

Ochre sea star on kelp off the coast of California, USA (© Ralph Pace/Minden Pictures)

View of a tractor and trailers of cabbage in a field in Sankt Pölten, Austria (© Stephan Zirwes/Getty Images)

View of Pisgah National Forest near Brevard, North Carolina, USA (© Adam Jones/Danita Delimont)

View of the harbour in Sitka, Alaska, USA (© Blaine Harrington III/Alamy)

Aerial view of jet skis in the ocean, Australia (© Nearmap/Getty Images)

Bare trees and autumn ferns in Beaver Lake Nature Center, New York, USA (© Chris Murray/Alamy)

Chameleon walking on a plant, Indonesia (© SnapRapid/Offset by Shutterstock)

Starlings flock over Lauwersmeer National Park, Netherlands (© Frans Lemmens/Alamy)

Old general store of Bents, Saskatchewan, Canada (© ImagineGolf/Getty Images)

New York City skyline with United Nations headquarters (© Sean Pavone/Alamy)

A pumpkin patch in British Columbia, Canada (© James Chen/Shutterstock)

Corfe Castle, Dorset, England (© Ross Hoddinott/Minden Pictures)

Aerial of pink salt lake in Lochiel, South Australia (© Amazing Aerial Agency/offset by shutterstock)

Grotesques of native Ecuadorian seabirds on the Basílica del Voto Nacional in Quito, Ecuador (© Henri Leduc/Getty Images)

Mazezilla corn maze at Klingel's Farm in Pennsylvania, USA (© Alex Potemkin/Getty Images)

Blakiston's fish owl in Hokkaido, Japan (© Martin Bailey/Offset by Shutterstock)

Dark Hedges in County Antrim, Northern Ireland (© VanderWolf Images/Shutterstock)

River running through Cheran Gorges, Alps, Savoie, France (© Jean-Philippe Delobelle/Minden)