Yarth

The material plane of Yarth is mirrored in both a negative and positive way by the Shadowfell and Feywild respectively. There is a wide Astral Sea that then separates these planes of existence from more distant conceptual planes where celestials, elementals, and fiends emerge. Some say that many of the gods themselves exist in these distant planes, but there is arbitrary and conflicting accounts and evidence depending on the mortal source of any information about what lies across the Astral Sea.