![M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. (Photo credit: Gonzales Photo - Astrid Maria Rasmussen Stock Photo - Alamy M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. (Photo credit: Gonzales Photo - Astrid Maria Rasmussen Stock Photo - Alamy](https://c8.alamy.com/comp/2A2CE38/m3-cityringen-is-copenhagen-metros-new-metro-line-which-is-a-155-km-underground-railway-with-17-brand-new-stations-in-copenhagen-photo-credit-gonzales-photo-astrid-maria-rasmussen-2A2CE38.jpg)
M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. (Photo credit: Gonzales Photo - Astrid Maria Rasmussen Stock Photo - Alamy
![M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. Here Østerport Station. (Photo credit: Gonzales Photo - Helena Lundquist M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. Here Østerport Station. (Photo credit: Gonzales Photo - Helena Lundquist](https://c8.alamy.com/comp/2A4AGEB/m3-cityringen-is-copenhagen-metros-new-metro-line-which-is-a-155-km-underground-railway-with-17-brand-new-stations-in-copenhagen-here-sterport-station-photo-credit-gonzales-photo-helena-lundquist-2A4AGEB.jpg)
M3 Cityringen is Copenhagen Metro's new metro line, which is a 15.5 km underground railway with 17 brand new stations in Copenhagen. Here Østerport Station. (Photo credit: Gonzales Photo - Helena Lundquist
![The platform at Frederiksberg Allé Metro Station on the newly opened Cityringen metro in Copenhagen Stock Photo - Alamy The platform at Frederiksberg Allé Metro Station on the newly opened Cityringen metro in Copenhagen Stock Photo - Alamy](https://c8.alamy.com/comp/2AXNMCA/the-platform-at-frederiksberg-all-metro-station-on-the-newly-opened-cityringen-metro-in-copenhagen-2AXNMCA.jpg)