United Kingdom
The world's oldest metro system, opened 1863
France
Iconic Art Nouveau stations
Japan
World's busiest metro network
United States
24/7 service, iconic subway
China
World's longest metro network
South Korea
High-tech and efficient
Singapore
Clean and modern MRT
China
Efficient MTR system
Thailand
BTS Skytrain & MRT
UAE
Driverless modern metro
Spain
Europe's second largest
Netherlands
Integrated with trams
India
One of the world's most extensive and efficient systems.
India
Modern solution for the maximum city.