Question

what was called as the iron monster's

Answer 1

underground railway of london was known as iron monsters ? They were called 'Iron Monsters ' as they were responsible for the massive destruction of london houses.

Answer 2

In the 19 century the construction of London tube Railways letter to a massive displacement of people around 40, 000 houses were destroyed for the construction of London tube Railways or London metro system These trains referred to iron Monsters!
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