Synchronous fireflies illuminate the forests of Great Smoky Mountains National Park, Tennessee, USA (© Floris van Breugel/Minden Pictures)

Sunwapta Falls in Jasper National Park, Canada (© Schroptschop/Getty Images)

Two mountain bike riders in Canyonlands National Park, Utah, USA (© Grant Ordelheide/Tandem Stills + Motion)

Pont Fawr and Tu Hwnt I’r Bont in Llanrwst (© Pajor Pawel/Shutterstock)

Walter's Wiggles trail in Zion National Park, Utah, USA (© Dennis Frates/Alamy)

Hermitage of La Pertusa, Lleida province, Spain (© bbsferrari/Getty Images)

Hermitage of La Pertusa, Lleida province, Spain (© bbsferrari/Getty Images)

Sunrise at the chalk pinnacles of Old Harry Rocks, near Studland, Dorset (© Graham Hunt/Alamy Stock Photo)

Millennium Bridge and St Paul's Cathedral, London (© Scott Baldock/Getty Images)

Griboyedov Canal and the Church of the Savior on Spilled Blood in Saint Petersburg, Russia (© Tomas Sereda/Getty Images)

Portree before sunset, Isle of Skye (© zhuzhu/iStock/Getty Images Plus)

The Dourbie Gorge in Grands Causses Natural Regional Park, Occitanie, France (© Hemis/Alamy)

Baron Lake in the Sawtooth Wilderness in Idaho, USA (© Patrick Brandenburg/Tandem Stills + Motion)

Surfer walking between palm trees in Medewi, Bali, Indonesia (© helivideo/GettyImages)

St Stephen's Green in Dublin, Ireland (© L_E/Shutterstock)

Beaver Falls on Havasu Creek in the Grand Canyon, Arizona, USA (© Edwin Verin/Alamy)

Jabiru storks in the Pantanal of Brazil (© Juan-Carlos Munoz/Minden Pictures)

Santa Elena Canyon under the Milky Way in Big Bend National Park, Texas, USA (© Stanley Ford/Shutterstock)

Dawn breaks over the ancient Sarsen Stones at Avebury, Wiltshire, at Summer Solstice (© Terry Mathews/Alamy Stock Photo)

A bearded emperor tamarin monkey carrying a baby (© Chris White/iStock/Getty Images Plus)

Male southern double-collared sunbird on rocket pincushion flower, Kirstenbosch Garden, Cape Town, South Africa (© Martin Willis/Minden Pictures)

Bull Point in Devon (© Robert Harding World Imagery/Offset by Shutterstock)

Path through Puzzlewood, Forest of Dean, Gloucestershire (© GuyBerresfordPhotography/iStock/Getty Images Plus)

German Navy tall ship Gorch Fock in waters close to Reykjavík, Iceland (© DEEPOL by plainpicture/Henn Photography)

Grandidier's baobab forest near Morondava, Madagascar (© Thomas Marent/Minden Pictures)

The Sanctuary of Madonna della Corona, near Verona, Italy (© Volodymyr Kalyniuk/Alamy)

Cheetah cubs climbing acacia trees in Ngorongoro Conservation Area, Tanzania (© Paul Souders/Getty Images)

Goats in an argan tree near Essaouira, Morocco (© Nizz/Shutterstock)

The Bojo River in Cebu, Philippines (© Amazing Aerial Agency/Offset by Shutterstock)

Moraine Lake in Banff National Park, Alberta, Canada (© Schroptschop/Getty Images)