The Vortessi Isles
Ahn’Kahn, the planet where the Vortessi Isles are located, is almost entirely covered in desolate, frozen wastelands devoid of life of any kind. The accepted myth of creation underlying most religions in Ahn’Kahn states that this is because Ahn’Kahn was originally created as a planet to hold monstrous creatures, and foul demons deep within it’s cavernous underdark. The frozen crust at the planet’s surface, a ward to keep those monsters bound within the prison.
The one known place where these frozen wastelands fail to encroach is the Vortessi Isles, an island archipelago of tropical lands and open seas. While the reason for the Isles existence is hotly debated by scholars and religions, not even the creation myth of Ahn’Kahn seems to have a specific reason as to the origins of the region, or it’s out of character climate.