Includes sewers or similar structures, such as storm drains, as a location.
Alternate name: Storm drains
Most sewers in real life are not spacious caverns as works of fiction would have you believe. Certainly there are some that are large, but usually just the manhole portion is accessible and beyond that it's a network of pipes too small (and too full) for anything to pass through besides waste.
The first Sewers video game was released in 1984.