There are two hidden bastions of life in its wildest, farthest variety on Azeroth. One lies far to the north on the continent known as Northrend. The other is far to the south amid the deserts of southern Kalimdor. Each lies surrounded by Titan complexes and the ruined remains of the same (Azjol-Nerub and Ulduar in Northrend, Ahn'Quiraj and Uldum in Kalimdor), and each is protected by powerful constructs keeping them inviolate. Indeed, only in these two places do the creations of the Titans freely act to preserve the equilibrium of the environment.
In Un'Goro and Sholazar, life on Azeroth was developed. These were the experimental controls, the crucibles, the drawing boards, and the scrap heaps for all life. If the Emerald Dream serves as a kind of blueprint for the way Azeroth was intended to unfold without the interference of the Burning Legion or the Old Gods, then Un'Goro and Sholazar are the last places left where that blueprint is being followed. Linked not only by a common purpose but also by a massive Waygate, these regions have come under heavy attack from the servants of the Old Gods as well as the mindless hordes of the Scourge, testing their defense to the utmost.