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How Subways Are Built

Subways are one of the most used transit systems in the world, to the point that it’s a little hard to think about a world without them, but the first subway opened in London in 1863. There is a large amount of careful planning that goes into the construction of a subway, and a lot of it is underground. Check out the animated visual below (courtesy from our friends over at BigRentz) to see how subways are built right under our feet.

How Are Subways Built