What is "tundras"

Usage examples of "tundras".

He had journeyed by dogsled across the tundras of Ombernorr, and on foot through the desolate, wolf-haunted forests of Bhakthorn.

Pillars a squad often Moldorn airships sailed across the tundras of Ombernorr, and landed on the frigid plain before the High Sanctuary of Ptolloden.