World Class Mumbai Underground Metro - An engineering wonder - YouTube
Underground Metro Stations in Chennai connect Rail, Road and Air Travel
London Underground map: The only six cities in the world with more Tube stations than London - MyLondon
First underground metro train in Chennai to run from Sunday - The Hindu BusinessLine
Going deeper underground: subway stations that will make you think "wow that's a really cool subway station!" | Intrepid Travel Blog - The Journal
Mumbai Metro Line 3: Everything you need to know | Housing News
Metro rail
Bangladesh's First Underground Metro Rail To Start Its Construction - The InCAP
Riding the UK's 2nd-Biggest Metro, Which Includes Ferry Trips: Photos
Kolkata to get first underground metro station in 25 years | Kolkata - Hindustan Times
World's oldest metro systems - Railway Technology
Siemens Mobility to deliver the new metro trains for London's Tube | Press | Company | Siemens
Four underground Chennai metro stations ready for trains
Namma Metro train completes journey on underground stretch | Deccan Herald
Underground Metro ideal, but not viable - Metro Rail News
CMRL issues four underground civil tenders for Chennai Metro Phase 2 | Urban Transport News
Trial Runs on Bangalore Metro's Underground Section Finally Begin - The Metro Rail Guy
Social distancing on underground metro train in Brussels, Belgium Stock Photo - Alamy
Chennai Metro's First Underground Stretch To Be Inaugurated Today
Subway | History, Transportation, Cities, & Facts | Britannica
London UK January 2021 Underground Tube Metro Train Stopped on a Platform Station in London, Doors Open with No People, UKs Editorial Image - Image of pandemic, platform: 211115590
Does any Indian city has underground metro rail system? If not, why? - Quora
List of metro systems - Wikipedia
Visual Slideshow
List of metro systems - Wikipedia
Subway metro underground station isometric poster Vector Image
