10. Rotterdam
- length: 100.6 km
- country: Netherlands
- year of discovery: 1968
- number of stations: 70
9. Hamburg
- length: 105.8 km
- country: Germany
- year of discovery: 1912
- number of stations: 93
8. Stockholm
- length: 108 km
- country: Sweden
- year of discovery: 1950
- number of stations: 100
7. Saint Petersburg
- length: 124.8 km
- country: Russia
- year of discovery: 1955
- number of stations: 64
6. Barcelona
- length: 147.2 km
- country: Spain
- year of discovery: 1924
- number of stations: 166
5. Berlin
- length: 147.8 km
- country: Germany
- year of discovery: 1902
- number of stations: 175
4. Paris
- length: 225.1 km
- country: France
- year of discovery: 1900
- number of stations: 306
3. Madrid
- length: 288.5 km
- country: Spain
- year of discovery: 1919
- number of stations: 242
2. London
- length: 405.2 km
- country: Great Britain
- year of discovery: 1890
- number of stations: 272
1. Moscow
- length: 435.7 km
- country: Russia
- year of discovery: 1935
- number of stations: 203