Olympus Olympus , also called Arborea on the planes , and later known better by its elvish name Arvandor , was the Outer Plane in the Great Wheel cosmology model embodying the disorganized but well - intentioned motives of the chaotic good alignment . Although the gods of Olympus and Toril occasionally interacted , the people of Toril rarely concerned themselves with the affairs of the Olympians and vice versa . Memories of Olympus eventually faded and by the time the World Tree cosmology was introduced Arvandor was the accepted name for this plane . Some characteristics and deities originally belonging to Olympus / Arvandor were ascribed to the World Tree plane of Brightwater . Arvandor survived the Spellplague and became part of the World Axis cosmology . Description . This plane had three layers with unique landscapes : Olympus / Arvandor . Two realms , so vast and influential that their names became synonymous with the plane and the layer they occupied , coexisted with little conflict : Olympus , home of the Greek pantheon , and Arvandor , domain of the Seldarine . Even before the World Tree cosmology became popular , the influence of the Greek pantheon was primarily focused on other Prime Material Plane s and had minor contact with the Forgotten Realms . Indeed , the two domains were separated by thousands of miles / kilometers of unclaimed wilderness and , due to the slight curvature of the landscape , were not visible to each other despite being located at the highest peaks of their respective lands . Dominating the Greek - controlled realms was Mount Olympus , a towering edifice that served as home to many of the Greek gods as well as a multiplanar conduit connecting Olympus directly to Hades , Gehenna , Tarterus , and Alternate Prime Material Plane s without passing through the Astral Plane . The usual " color pools " existed for Astral travelers and the permanent portals to neighboring Outer planes Happy Hunting Grounds / Beastlands , Gladsheim , and Concordant Opposition took the form of large , spinning crimson disks . " Divination " was required to determine the destination of each portal and all pools and portals within thousands of miles / kilometers of the Greek or elvish demesnes were either guarded , surrounded by stone walls and iron gates , or both . This layer was starkly mountainous with deep chasms , huge passes , and foothills the size of Prime plane mountains . Giant trees adorned the rugged terrain while the flatter parts were covered with untended vineyards , orchards and fields of wild wheat , eventually giving way to wilderness . Monsters and evil beasts took advantage of the lack of vigilance and roamed the wild places , providing a challenge to any who would go exploring . Ossa / Aquallor . Ossa to the Greeks and Aquallor to the elves , this layer was mostly filled with shallow seas no more than three feet ( one meter ) deep . The river Oceanus had its outlet here , delivering travelers from Elysium or the Happy Hunting Grounds / Beastlands safely in the middle of nowhere . The shallow seabed was occasionally broken by cavernous trenches leading to undersea domains of various sea gods or huge maelstroms that funneled water back to Thalasia in Elysium , thus completing the cycle . The barriers between layers of this plane were somewhat rare compared to other Outer planes . Being the middle layer , Ossa / Aquallor had barriers that led to the watery realms of Poseidon and Deep Sashelas in Olympus / Arvandor , as well as a few that lead to the third layer , Pelion / Mithardir . Pelion / Mithardir . Mithardir means " white dust " in the elven tongue , and the mysterious third layer was a land of blowing white sand , with snow in the colder regions . Both the Greeks and the elves had stories and legends about powerful beings who once lived here , creating artifacts and architecture that became all but buried in the dust after they presumably died or departed . Their fate , and that of any creatures left behind , remains unknown . Inhabitants . Deva s , hollyphant s , planetar s , solar s , foo creature s , and agathia formed the usual cohort of creatures ubiquitous to the Upper planes . But Olympus / Arvandor was also the home of giant beasts and legendary monsters , such as giant bears , eagles , wolves , serpents , boars , lions , and wild cattle . Gorgon s , cyclopes , giant s , medusa e , chimera e , harpies , sphinx es , and pegasi all made nests or lairs in the mountainous terrain or lived and lurked in the wilderness of the first layer . Realms . Nearly all the known realms of this plane existed on the first layer .