Did you know that The Eternal Well is a repurposed version of the original character select zone used from the Classic era through Velious?
@fxattack mentioned almost 3 years ago that it's possible to see some kind of altar room if you peek through the wall in that zone. That altar is where good/neutral characters would be displayed at the character select screen. The dark, magma-filled cave we know as The Eternal Well is where evil characters would show up. I believe the game determined which one your character would use based on your deity/race combination, a unique feature not seen at any subsequent character select screen.
Here's a screenshot of the good/neutral side taken from an angle that shows the evil side (The Eternal Well) in the background:
To see it in action, here's a video by
Secrets of EQEmu fame showcasing both areas of the zone: