the.com/underworld
Where the dead and the criminal both go to avoid the daylight.
means Either the mythological realm of the dead beneath the earth, or the hidden society of organized crime.
from Old English underweorold, literally the world below — first the afterlife's basement, later borrowed by crime as a place beneath polite society.
Greek addressHades, ruled by a god of the same name
Crime senseTook the slang meaning around the 1900s
River feeCharon ferried souls for a coin under the tongue