River Styx
From Tardis Wiki, the free Doctor Who reference
The River Styx was a river in Greek mythology which the deceased had to cross in order to enter the Elysian Fields. When Katarina (who was from ancient Greece) died, she ended up in the afterlife, and had to cross the river Styx to get to the fields. (PROSE: Katarina in the Underworld [+]Loading...["Katarina in the Underworld (short story)"])
