Mount Pelion
Planar Pathway
Mount Pelion, the White Mountain of the Sands, is the manifestation of Mount Olympus on the layer of Pelion. It has a broad flat top, across which the desert winds blow night and day. The passages here open and close by the passing of the hours, as sand blows in and out of them, revealing and concealing the way beyond. Bralani eladrin and sandlings roam near the portals, but the harsh landscape itself is what deters most planewalkers here.
Both Mount Pelion and Mount Ossa featured in a giantish plan to overthrow Zeus many years ago, and the Lord of Olympus is watching the giants still, to see what their next move may be. Some of them were thrown into Carceri, which may explain the presence of the giantish god Grolantor in Tarterus.
Source: Alex Roberts