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

Solna Centrum Metro Station, Stockholm, Stockholm County, Sweden

St Charles train station, Marseille, Provence Alpes Cote d'Azur, Provence France

Italy, Naples, Toledo Metro Station

Baker Street Underground station, London, England, UK

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.

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

U-Bahn Metro Station, Munich, Bavaria, Germany

U-Bahn Metro Station, Munich, Bavaria, Germany

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

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

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

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

Überseequartier station on U4 U-Bahn line, HafenCity, Hamburg, Germany

HafenCity Universität station on U4 U-Bahn line, HafenCity, Hamburg, Germany

UK, England, London, West End, Tottenham Court Road Underground Station

Spain, Basque Country, Bilbao. The interior of Abando train station.

Portugal, Lisbon. Escalators and the colorful decorations at Olaias subway station.

Minsk metro, Minsk, Belarus

Minsk metro, Minsk, Belarus

Minsk metro, Minsk, Belarus

Toledo subway station in Naples, Campania region, Italy.

The sign to Gran Via metro station. Gran Via is downtown main avenue with buildings from the early 20th century. Madrid, Spain

UK, England, London, The West End, Piccadilly Circus, Underground Station entrance,snow storm

UK, England, London, The West End, Piccadilly Circus, Underground Station entrance,snow storm

Baker Street Underground station, London, England, UK

Germany, Hamburg, HafenCity. Modern U-bahn station Uberseequartier on the new U4 line.

Art Nouveau metro station, Paris, France

Conductor at a subway station in Tokyo, Japan