Not much is known about the Elven homelands. The Elves are a noble race by and large, and they seem to enjoy the colder woodland regions to the south of the Empire.
Lore regards Elves as sort of “keepers” of magic, secrets, and knowledge. This is because the Elves are (probably) the largest nation (if indeed there is a coherent single Elven nation) that has peacefully withstood the advance of the Empire’s colonisation in all directions. Hence, they have remained sovereign not only in territory and commerce, but also in trade of knowledge.