The Halls of Knowledge and the Azure Havens

 So I have been giving more thought to my Post-Apocalyptic Alfheim campaign and my megadungeon now has a name- The Halls of Knowledge. Or possibly Halls of Divine Knowledge. Also, I have decided that I will be saving the creation of this adventure for later and for now will be focusing on a simpler scenario to start the game. Here is some of the background I have been developing

The campaign will start off in the Azure Havens, a series of elven nations along the eastern coast of the continent. Specifically, one of their cities has been greatly expanded to accommodate traffic from the continent to the east, one more similar to medieval Europe. This is where many of the elves emigrated long, long ago due to a second, less destructive schism with those who wanted to follow the leader of the Great War as their Overking and those that did not. Essentially those that followed the Overking were high elves and those that did not are wood elves, though I am uncertain as to whether I will have a mechanical difference between the two.

 This city is a mix between the old elven city and newer, largely human architecture. There are large sections devoted to the armies coming from the lands of men. Much of this is devoted to kinds of entertainment that the elves would eschew... Not far from this city is a citadel that has been destroyed by the goblinoid horde and has yet to be reclaimed... partly because the ruins have been occupied by fell creatures, including some remaining goblinoids. To clear out this citadel will be an early goal of the campaign. I am considering even having a portal to the Halls of Knowledge in the ruins of the citadel.

 I have given some thought to the other races. The dwarves are also generally split into hill and mountain dwarves...  with "hill dwarves" being those on the outskirts of the dwarven hegemonies (there are seven, one for each of the dwarven forefathers, though some are more centralized/intact than others) and the "mountain dwarves" are those in the metropolitan heartland, including the subterranean homelands, each centralized aground a great "manor," that may or may not be still inhabited by its original denizens. Except on the elven continent are the duergar, who dug too greedily and too deep and disturbed eldritch beings which altered them. Part of the drow have been corrupted by these same eldritch creatures after being driven into the depths of the world by their goblinoid former servants (though some remain under the drow's aegis).