Which river comprised the boundary between Hades and Earth in Greek mythology?
Styx Styx In Greek mythology, Styx (; ) is a deity and a river that forms the boundary between Earth and the Underworld, often called "Hades", which is also the name of its ruler. The rivers Styx, Phlegethon, Acheron, Lethe, and Cocytus all converge at the center of the underworld on a great marsh, which sometimes is also called the Styx. According to Herodotus, the river Styx originates near Feneos. Styx is also a goddess with prehistoric roots in Greek mythology as a daughter of Tethys, after whom the river is named and because of whom it had miraculous powers. The
Eridanos (river of Hades) with the excavations for construction of the Athens Metro. Eridanos is the name that has been applied by geologists to a river which flowed where the Baltic Sea is now, a river system also known simply as the "Baltic River System". Eridanos (river of Hades) The river Eridanos or Eridanus (; , "Amber") is a river in northern Europe mentioned in Greek mythology and historiography. Hesiod, in the "Theogony," calls it "deep-eddying Eridanos" in his list of rivers, the offspring of Tethys and Oceanus. Herodotus suspects the word "Eridanos" to be essentially Greek in character, and notably forged by some