Roman Forum, Rome, Italy (© Peter Zelei Images/Getty Images)

Zugspitze, Garmisch-Partenkirchen, Germany (© Robert Jank/Alamy)

Mount Rainier, Mount Rainier National Park, Washington state, USA (© Brad Goldpaint/Cavan)

Greater one-horned rhinoceroses, Kaziranga National Park, Assam, India (© Robert Harding World Imagery/Shutterstock)

Weinstadel on Pegnitz river, Nuremberg, Germany (© Reinhard Schmid/Huber/eStock Photo)

Mont-Saint-Michel, Normandy, France (© DaLiu/Getty Images)

Great cormorants, Hesse, Germany (© Wilfried Martin/Getty Images)

Lake Tekapo, South Island, New Zealand (© Sophie Dover/Getty Images)

Saint-Étienne-de-Tinée, Alpes-Maritimes department, France (© CAVALIER Michel/hemis.fr/Alamy)

Indian peafowl, Nagarahole National Park, Karnataka, India (© Vivek BR/Shutterstock)

Ponte Vecchio bridge, Bobbio, Italy (© afinocchiaro/Getty Images)

Juniper Springs, Ocala National Forest, Florida, USA (© Michael Warren/Getty Images)

Bréhat, Côtes-d'Armor, France (© LECLERCQ Olivier/hemis.fr/Alamy)

European hare, Netherlands (© Jim Brandenburg/Minden Pictures)

Lanyon Quoit, Cornwall, England (© Guy Edwardes/Minden Pictures)

Pasque flower, Upper Palatinate, Bavaria, Germany (© Design Pics/Alamy)

Prairie Creek Redwoods State Park, California, USA (© Jack Dykinga/Minden Pictures)

Bamford Edge, Peak District National Park, Derbyshire, England (© R A Kearton/Moment Open/Getty Images)

Chicago, Illinois, USA (© Razvan Sera/Amazing Aerial Agency)

Javan tree frog, Indonesia (© kuritafsheen/Getty Images)

Holy Trinity Church, Stratford-upon-Avon, England (© James Osmond/Getty Images)

Thousand Springs State Park, Idaho, USA (© knowlesgallery/Getty Images)

Grand Canyon National Park, Arizona, USA (© spkeelin/Getty Images)

Red squirrels, Scottish Highlands (© Neil Anderson/Minden Pictures)

Lauterbrunnen valley, Swiss Alps (© Leonid Andronov/Getty Images)

Great tit and crocuses (© Nataba/Getty Images)

Ancient theatre of Taormina, Sicily, Italy (© Antonino Bartuccio/eStock Photo)

Kawachi Fuji Garden, Kitakyushu, Japan (© Steve Tan C K Photography/Getty Images)

Caribbean coast near Buritaca, Colombia (© Nicholas Hills/Getty Images)

MacKenzie Beach, Tofino, British Columbia, Canada (© Robert Postma/Plainpicture/Design Pics)

Eiffel Tower, Paris, France (© Susanne Kremer/eStock Photo)