Brocken Spectre on the summit of Goat Fell, Isle of Arran, Scotland, United Kingdom, Europe

Mural of Quebecers, Quebec City, Quebec Province, Canada, North America

Tall buildings on North Michigan Avenue reflecting in the Cloud Gate steel sculpture by Anish Kapoor, Millennium Park, Chicago, Illinois, United States of America, North America

Tall buildings on North Michigan Avenue reflecting in the Cloud Gate steel sculpture by Anish Kapoor, Millennium Park, Chicago, Illinois, United States of America, North America

Buildings on West Wacker Drive reflected in the Trump Tower, Chicago, Illinois, United States of America, North America

Skyscrapers reflecting in the Cloud Gate steel sculpture by Anish Kapoor, Millennium Park, Chicago, Illinois, United States of America, North America

Aerial view of Le Morne Brabant and the Underwater Waterfall optical illusion and natural phenomena, Mauritius, Indian Ocean, Africa

Aerial view of Victoria Quays and Sheffield city skyline at dusk, Sheffield, South Yorkshire, England, United Kingdom, Europe

Self-portrait with aurora borealis (Northern (Polar) Lights) over the boreal forest outside Yellowknife, Northwest Territories, Canada

Optical illusion, man holds off-roader on hand, Salar de Uyuni, Uyuni, Potosi, Bolivia, South America

Arched ceiling, ceiling painting, 1703, by Andrea Pozzo, creating a perspective optical illusion, Jesuitenkirche church, Doktor-Ignaz-Seipel-Platz square 1, Vienna, Austria, Europe

Optical illusion, floor, mosaic, Lateran Basilica, Basilica di San Giovanni in Laterano, historic city centre, Rome, Italy, Europe

Two Masai giraffe (Giraffa camelopardalis tippelskirchii) crossing necks by trees, Serengeti, Tanzania