Hades Waterway is a term used to refer to the river Styx, which is a mythical river in Greek mythology. It was believed to be a boundary between the world of the living and the underworld, and was also thought to be the river that souls had to cross in order to reach the afterlife. The river was also known as the 'River of Hate' because it was said to be so dark and cold that it could freeze the soul of anyone who touched it.