Ithal is the land of angels. There are few records of it due to the angels being very closed off.
It is always cold though it's documented that centuries ago, Ithal experienced heat waves. The cold has lead to most life, other than angels, failing to thrive in that realm.
Reapers who enter this realm often come back and refuse to elaborate on anything they saw. There are a few reapers from Ithal, and most have accepted that they are no longer welcome in Ithal due to their current profession. Why they continue to keep Ithal's features a secret is beyond me.