Optimistic paintings tied to railings on a drab British summer day, United Kingdom, Europe

King's College Chapel, Cambridge

Two juvenile brown pelicans (Pelecanus occidentalis) behind an adult in the lower Gulf of California (Sea of Cortez), Mexico. Note the uniform drab brown coloration of the juvenile plumage.

Juvenile brown pelican (Pelecanus occidentalis) in the lower Gulf of California (Sea of Cortez), Mexico. Note the uniform drab brown coloration of the juvenile plumage.

Lynx (Lynx lynx) in the snow

A housing estate near the railway station Amstelstation, Amstelplein, Netherlands, Europe

CONAF (Corporacion Nacional Forestal or National Forest Service) office at Reserva Nacional los Flamencos at the Salar de Atacama salt flats, Region de Antofagasta, Chile, South America

Ruins of Tulor, an ancient Atacamenos village, San Pedro de Atacama, Region de Antofagasta, Chile, South America

Ruins of Tulor, an ancient Atacamenos village, San Pedro de Atacama, Region de Antofagasta, Chile, South America

Ruins of Tulor, an ancient Atacamenos village, San Pedro de Atacama, Region de Antofagasta, Chile, South America

Wild Cat (Felis silvestris) in the snow, Bavarian Forest National Park, enclosed area, Neuschoenau, Bavaria, Germany, Europe

Wild Cat (Felis silvestris) in the snow, Bavarian Forest National Park, enclosed area, Neuschoenau, Bavaria, Germany, Europe

Wild Cat (Felis silvestris) in the snow, Bavarian Forest National Park, enclosed area, Neuschoenau, Bavaria, Germany, Europe

Sand dunes, Erg Awbari, Sahara desert, Fezzan, Libya, North Africa

Sahara, near Chinguetti, Mauretania, northwestern Africa

Sand dunes, Erg Awbari, Sahara desert, Fezzan, Libya, North Africa

Monotone building facade with balconies, railings and small windows, Tempelhof, Berlin, Germany, Europe

Many balconies, uniform, windows, facade, high-rise building, hotel, Antofagasta, Norte Grande region, Northern Chile, Chile, South America

Residential high-rise building, Meschenich district in Cologne, North Rhine-Westphalia, Germany, Europe

Tourist camp in the sand dunes of In Tehak, Tadrart, Tassili n'Ajjer National Park, Unesco World Heritage Site, Algeria, Sahara, North Africa

Trunks and ferns in cloud forest, Madeira, Portugal

Residential high-rise building, Meschenich district in Cologne, North Rhine-Westphalia, Germany, Europe

Sand dunes, Erg Awbari, Sahara desert, Fezzan, Libya, North Africa

Ministerio de Sanidad, Politica Social e Igualdad or Ministry of Health, Social Affairs and Equality, Madrid, Spain, Europe

Road going around a bend on a hillside with a view of a valley and mountains under an overcast sky; Westfjords, Iceland