The Frigid Lands are cold. However, it also holds the world’s largest untouched forest (in real life as well as in the campaign). It comprises the area above the Wild North and Antarctica.
There are actually people who live in the Frigid Lands, but these people are mainly Eskimo, Inuit type people, who have adapted quite well to the cold. There are also plenty of wild animals and cold-typed non-humans running around, having a good ol’ time.
Due to the nature of the area, there’s actually some legends of frozen cities, still in perfect, Pre-Rift condition. Many glory-hound adventurers and historians have gone off in search of these perfect ruins, but none have ever returned.