London subway in the past

[custom_adv]

The system’s first tunnels were built just below the surface, using the cut-and-cover method; later, smaller, roughly circular tunnels—which gave rise to its nickname, the Tube—were dug through at a deeper level. The system has 270 stations and 250 miles (400 km) of track.

Check Also

Photos from behind the scenes of the series “mahaleh behdasht”

ranian television of the 1980s and 1990s underwent a unique transformation in the field of …