in greek myth the main river in hades

In Greek mythology, the main river in Hades, the realm of the dead, is called the River Styx (Styx). It is one of the five rivers of the Greek underworld and is often depicted as a boundary separating the world of the living from the realm of the dead. Souls of the deceased had to cross the River Styx to enter the underworld. The river is significant in many myths and plays a role in various stories involving gods, heroes, and the afterlife in Greek mythology.