Hermes took to the entrance of Hades the dead persons soul.
Many believed Hades was under the Earth.
Later on the christian religeon converted and distorted Hades and called it Hell.
However, Hades was nothing like Hell.
Entry to Hades was not automatic.
To gain entry the dead person`s soul needed the proper funeral rites and fare to pay the ferryman.
The gateway to the underworld is gaurded by Cerberus, a three headed dog.
No living soul is allowed into Hades past him and no dead souls out.
Judegment by the Gatekeepers followed.
However, any souls sentenced to eternal damnation by the Gods in Tartarus had already been sent there by the Gods.
A few fortunate souls went to Elysium.
However most went to the Plain of Asphodel.
After drinking from the Pool of Lethe they lost all memory of their former selves.
Greek Mythology
The Penguin Historical Atlas of Greece (Hist Atlas)
Paralumun New Age Village