Home of the mysterious Taysen race, the Canyon of the Moon remained unexplored for over a thousand years. The Soluman Empire largely ignored it, after several scouting expeditions disappeared into it, and marked it as a dangerous area. Only after the arrival of the Kurr'd-ah did anyone successfully make contact with the Taysen living at the bottom, and that contact was short-lived before the canyon was swallowed by the Kurr'd-ah advance.
The canyon itself is large, roughly 40 miles long and slightly curved. Its width varies widely, both along its length and depth, so much that the bottom is always blocked by the numerous crags and outcroppings along the side. A very faint mist overshadows the entire canyon, hovering roughly 100 yards down inside it. The mist does not interfere with vision often, but dispels and absorbs any magic passing through it, aiding in the seclusion of the canyon's inhabitants.
Those few who have made it to the bottom report an alien but thriving culture, primitive in some ways, advanced in others. The Taysen cluster around elders and shamans of their people, living off of fungi and creatures inside the multitude of caverns winding through the sides of the canyon. The vegetation that survives along the bottom, through filtered sunlight, is bizarre and otherworldly. Perhaps the strangest phenomenon, and the one that grants the canyon its name, is the absence of the sun. Though daylight reaches the bottom in a reduced form, the actual sun is never visible, the arc of its journey across the sky blocked by the walls of the canyon. The moon passes overhead with a startling regularity, however. The Taysen appear to know what the sun is, through their tales, but few have ever seen it.
Despite being more forgiving of trespassers recently, the Taysen are still very xenophobic. With the Kurr'd-ah conquered lands overlapping the area around the canyon, few attempts to establish relations have been attempted, and the Taysen appear to prefer it that way. The Kurr'd-ah themselves avoid the canyon, a curious tendency which is perhaps good for them, as the Taysen attack any of the Kurr'd-ah with a near-suicidal frenzy.