No specific location
1) You need to have the Silver Coin to start the quest. The Coin can be gained randomly throughout the year. It suddenly appears in your inventory with the following message: An ethereal vision of a lady appeared before me and gave me this Silver Coin. She said something about stopping the return of the dark one on Day of the Dead... It will transport you to the Eternal Darkness which you must find your way though. Make sure you are ready for the adventure before you use your coin.
2) Entry to Hades can be done at any day or time, from any city. The Silver Coin can be used by anyone over the age of 16. Make sure you are ready for the adventure before using it.
From Eternal Darkness, explore :
N N E S - S E
use the dark pit
level 2 (There are zombies at this level)
From Bottom of the Pit, explore :
N E N E - S S E S
From Charon's Passage :
Wait 60 minutes for the balse and the use the item.
From The Gates of Hades :
N N N NE - E N
From The Northern Crossroads :
W N N SW - W NE N NE
On Northern Path of Antenora - use item and you'll shortly be in Antenora.
Once you arrive safely in Antenora, you will receive the achievement, “Visited Antenora.” This is where you start encountering ghosts. You will also start receiving items to help you hunt them. As long as you have space in your inventory you might receive the following items:
Proton Pack This is what you will need to kill ghosts. Once you have killed your first ghost you will receive the achievement, “Who ya gonna call?”
Size/Encumbrance: 10 %
PKE Meter This will allow you to occasionally see just how much energy the current Zombie Master still has left.
Ecto Goggles Needs to be worn in you Items and helps you see the ghosts better.
Size/Encumbrance: 5 %
Ghost Trap (extremely rare) This usually only shows up if you actually capture a ghost.
Size/Encumbrance: 5 %
Encounters with Master Zombies may result in this addition to your inventory:
Handful of Ectoplasm
Category: Special Items
Description: Ectoplasm is a substance that comes from ghosts and outworldly beings. It usually appears in a form of a slimy, greenish substance.
Size/Encumbrance: 1 %
Reported to give to 2 XP if used although it sometimes give a slight mood loss. This item can be used anywhere.
You will encounter zombies from the second level. Some of those encounters will result in a Foul Smell from their funk. A list of open homes with showers to wash off the funk is in the 3rd post: 2124113.3
Items to be found inside of Antenora:
Ghost Trap (Rare)
XP for killing Zombies
Visited Antenora & Who ya gonna call