France, Paris, the mast of the Havre Caumartin metro station and the Christmas decorations of Boulevard Haussmann

T-Centralen Metro Station, Stockholm, Stockholm County, Sweden

Solna Centrum Metro Station, Stockholm, Stockholm County, Sweden

Gran Via street metro sign, Madrid, Community of Madrid, Spain

View of Manhattan from Queens train station, Manhattan, New York City, USA

Europe, United Kingdom, England, London, Baker Street underground station

Italy, Naples, Toledo Metro Station

North Korea, Pyongyang. A guard seeing off a train at Yonggwang ('Glory') metro station, on the Chollima line.

Art Deco Entrance to Abessess Metro stop, Montmartre, Paris, France.

Evening at the Metro stop Saint Michel in the Latin Quarter, Paris, France

Velazquez metro station. One of the most elegant areas of the city of Madrid, where is La Milla de Oro, shopping area.

France, Paris, the mast of the Havre Caumartin metro station and the Christmas decorations of Boulevard Haussmann

France, Paris, The flag pole of the Franklin D. Roosevelt metro station and the Christmas decorations of avenue Montaigne

France, Paris, The flag pole of the Franklin D. Roosevelt metro station and the Christmas decorations of avenue Montaigne

Radhuset metro station, Stockholm, Stockholm County, Sweden

Solna Centrum Metro Station, Stockholm, Stockholm County, Sweden

T-Centralen Metro Station, Stockholm, Stockholm County, Sweden

Stadion Metro Station, Stockholm, Stockholm County, Sweden

Oberbaum Bridge, Spree, Friedrichshain, Berlin, Germany, Europe

Chueca metro sign with rainbow flag, Madrid, Community of Madrid, Spain

Staircase of the underground station Lorenzkirche, Nuremberg, Middle Franconia, Bavaria, Germany, Europe

France, Paris, Saint-Germain district, metro station

France, Paris, Avenue Montaigne, Christmas lights, the metro

Europe, UK, England, London, Westminster, interior of Westminster Underground railway station, architects: Michael Hopkins & Partners, completed 1999, no people

United Kingdom, England, London, interior of a passenger concourse on the London Underground

View of Manhattan from Queens train station, Manhattan, New York City, USA

Japan, Honshu, Tokyo, Asakusa, Ginza Subway Line, Asakusa Station, Young Woman Standing in Front of Mosaic depicting Popular Festivals

France, Paris, Subway Sign: National Assembly

Ribs of Oculus station house designed by architect Santiago Calatrava, World Trade Center station (PATH), Manhattan, New York, USA

Ribs of Oculus station house designed by architect Santiago Calatrava with One World Trade Center behind, World Trade Center station (PATH), Manhattan, New York, USA

Ukraine, Kyiv, Arsenalna Metro Station, Currently The Deepest Station In The World, Part Of The Kyiv Metro Line, Chandelier Lighting

Ukraine, Kyiv, Arsenalna Metro Station Escalators, Currently The Deepest Station In The World, Part Of The Kyiv Metro Line

Sweden, Stockholm, Stockhom Underground Metro, Tekniska Hogskolan Station, escalator lit with colored lights

Sweden, Stockholm, Stockhom Underground Metro, Tekniska Hogskolan Station

Thorildsplan metro station decorated with artwork on tiles inspired by pixels of computers and video games characters, Stockholm, Sweden

Men looking at artwork and paintings on rocks, Solna Centrum metro station, Stockholm, Sweden

France, Paris, Saint Michel metro station

France, Paris, Monceau metro station of Guimard plant style

France, Paris, Cluny Sorbonne metro station, Jean Bazaine mosaics with signatures of famous Sorbonne students