Council of Elrond

I've long wondered, and even in the age of the internet, never been able to figure out what was supposed to be represented by Geann-a-Lisch as the 4th Darkhaven.
I know ICE used some non-canonical materials from the RPG (e.g. Nazgul names) but even with that I've never been able to find anything about what this was supposed to be.
Anybody have thoughts (or even just personal theories) on why this was the 4th Darkhaven and what it is supposed to represent?

https://notionclubarchives.fandom.com/w ... aying_Wiki



try on here - I believe it could be the same thing as Earthwall (or something along these lines)

There's some lore about Geann-a-Lisch on p. 154-5 of the Lidless Eye Player's Guide. In short, it's the ruins of an old 2nd age Númenórean fortress that was contested during early 3rd age and then abandoned after the great plague. Now filled with wights, trolls, and other nasties and considered cursed.