The Mud Flood They Buried Under Your City — And Why the Buildings Still Don't Match the Photos In the 1800s, major American cities faced constant flooding and disease from muddy, low-lying streets. Engineers in Chicago and Seattle made a radical decision: they raised entire street grades by burying the old city surface under layers of soil and fill.
This video reveals the real historical story behind the "buried buildings" you see in old photographs — from Chicago's massive jackscrew building lifts and Chesbrough's sewer system to Seattle's post-fire regrading that created the famous Underground.