Its high, cold mountains and sharp cliffsides make for terrible societal conditions for any race that can not fly, although there have been many notable attempts to colonize Kiston over the years. However, these attempts almost always failed with colonists being lost at sea, or having returned psychologically damaged beyond belief.
The mountains themselves were far from empty, ancient caves, runes, and dungeons plagued the mountains, many of them created by Tiamat and her dragon followers, while other crafted delicately by the other dangerous and insidious creatures lurking on the island. Most notably, the The Crystal City.
Besides being remarkably high, the mountains and their caverns extended deep below the surface, most notably into the territory of Svirfneblin, a race of creatures living in the Underdark below Kiston.
It was here that the Dragons of the realm were first born, and from these mountainous peaks they flooded the rest of the realm.
Tiamat was lucky that her dragons had Kiston all to themselves. Before The Holy War, the dragons could spend time in Kiston safely, protected from being hunted down. Many of them grew to great sizes and age. These Wyrms would later appear fully grown in the second draconic war against the realm.