they are both goddesses and are in the underworld
Lethe is the Underworld river of oblivion/forgetfulness. Styx is the Underworld river of hate, upon which the gods and goddess swear oaths upon.
the river Lethe and the river Styx. if there are more then I don't know them
I believe it's the river Lethe, but I'm not 100%
Lethe is the Greek Goddess of oblivion/forgetfulness, associated with the Underworld river of the same name.
There are Five rivers according to Greek Mythology: Acheron (woe), Cocytus (wailing), Phlegethon (fire), Lethe (forgetfulness), Styx (across with which spirits of the dead were ferried also the river of dreams lost because of death)
Geographically, the underworld is surrounded by a series of rivers: The Acheron (river of woe), The Cocytus (river of lamentation), The Phlegethon (river of fire), The Styx (river of unbreakable oath by which the gods swear), and The Lethe (river of forgetfulness).
The Styx is one. It could make mortals immortal. Sorry, don't know any others. Styx, Acheron, Cocytus, Phlegethon and Lethe are the five rivers of the underworld.
Acheron - the river of woe Cocytus - the river of lamentation; Phlegethon - the river of fire; Lethe - the river of forgetfulness; Styx - the river of hate. Source: http://www.pantheon.org/articles/s/styx_river.html
In Greek Mythology, Lethe is the Underworld river of oblivion/forgetfulness.
The river Lethe was associated with Lethe a goddess of forgetfulness. Making her a daughter of Eris or Oceanus.
It is called Lethe.
The River Styx is the most well known river in the Underworld. It is the river of oath. Charon has to ferry the dead souls across it so they can enter the Underworld. The river Lethe is also an Underworld river. It is the river of forgetfulness. If you touch or drink its waters, you will forget your identity.