#30: Ancient Roman Sewer Explosions
The ancient Romans engineered the Cloaca Maxima as a pioneering sewage system in the 6th Century BC, enhancing the sprawling metropolis with impressive, though primitive, infrastructure.

Public restrooms in ancient Rome often accumulated hazardous gases such as methane, leading to rare but alarming explosions or fires due to the sewers’ vaulted ceilings and poor ventilation.
