Under The Ground!
Early subway systems were hatched as a solution to the problem that sprang up when rapidly growing cities in the wake of the Industrial Revolution found themselves unable to expand where they needed it most — in their centers. Streets, built wide enough for modest horse and carriage traffic, were now jammed to a standstill by horse-drawn public buses and private carts, trolleys and streetcars, delivery carts, pedestrians, and eventually automobiles. So, tunnels were dug beneath the streets — and subways were born. Swipe your ticket in these 10 cities with the oldest subway systems around the world.
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