Arborea

Called Olympus by those that recognize the human pantheon of ancient Greece, it was better known in the Realms as Arvandor, the home of the elven gods and Chaotic good creatures in the Great Wheel cosmology model.

Description
In fact both pantheons occupied their own realms on the first layer of this plane, separated by thousands of miles of unclaimed wilderness.

Layers
Arvandor, which the elves use as the name of both the layer and plane, is the home of the Seldarine. Brightwater is the realm of Lliira, Sharess, Sune, and Tymora.
 * Layer 1: Olympus/Arvandor

Elavandor is the realm of Deep Sashelas.
 * Layer 2: Ossa/Aquallor

Amun-Thys is the realm of Nephthys.
 * Layer 3: Pelion/Mithardir