Juan Manuel Borrero / Stone pillars and sculpted capitals at cloisters of the St. Benet monastery, Barcelona, Catalonia, Spain.

Oscar Dewhurst / Red deer (Cervus elaphus) stag roaring in the mist, silhouetted, backlit at sunrise. Richmond Park, London, UK. October

Oscar Dewhurst / Red deer (Cervus elaphus) young stags fighting in grassland. Richmond Park, London, UK. September

Pal Hermansen / Nuuk, capital of Greenland, July 2016.

Peter Lewis / Aerial view of River Thames and Tower Bridge in London at night. October 2014.

Peter Lewis / Aerial view of River Thames and London, lit at night, England, UK. October 2014.

Merryn Thomas / Quito, formally San Francisco de Quito, is the capital city of Ecuador. November 2013.

Merryn Thomas / Buenos Aires, Argentina. South America, January 2014 .

Merryn Thomas / Santiago, the capital and largest city of Chile. December 2013.

Sven Zacek / Aerial view of Tallinn, the Capital of Estonia at night, with Charles' Church in the foreground, Estonia, October 2013.

Steve O. Taylor (GHF) / Portrait of Peul / Fula herdsman visiting the capital Niamey, Niger, 2004.

Dong Lei / Barkam town, with prayer flags. Capital of Ngawa Tibetan and Qiang autonomous prefecture, Qinghai-Tibet Plateau, Sichuan Province, China, Asia

Nick Upton / Roman Temple of Trajan at the Acropolis of Pergamon (Bergama), with fallen column capitals in the foreground, Turkey. August 2009

Nick Upton / Roman Temple of Trajan at the Acropolis of Pergamon (Bergama), with fallen column capitals in the foreground, Turkey. August 2009

Juan Manuel Borrero / Stone pillars and sculpted capitals at cloisters of the St. Benet monastery, Barcelona, Catalonia, Spain.

Jose B. Ruiz / Houses of Parliament and Big Ben, Westminster, London, UK. Double decker bus crossing bridge

Jose B. Ruiz / Tower Bridge at dusk, London, UK.

Jose B. Ruiz / Houses of Parliment and Big Ben, Westminster, London, UK.

Jose B. Ruiz / Houses of Parliment and Big Ben, Westminster, London, UK. Double decker bus.