The farther east you go in Edenfell, the hotter it gets.
Well past Summerwind's southern border, southeast of the kingdom, you will find the Land of Fire; a completely hostile environment of volcanoes, fire and lava; streams of death flow in crevices and pools along the steaming, rocky ground.
The only thing between Summerwind's domain and this infernal place is the warm Great Salt Lake.
This terrifying place is as desolate as it is east of Edenfell - even the air is out to get you - and anyone in their right mind will stay far away from it for as long as they still value their lives.