Underdark

This is a place beneath the surface, where no natural sun has existed.
Once was the surface, but some great cataclysms pushed the land and denizens down all while covering the face of the realm.
What makes it cool A river of lava runs through it Only 3% is estimated to be mapped there are 5 number of roads * the walked - normal roads * Shadow - those known and mappe dby the denizens, never shared in their entirety and anyone who tries is killed * Silvered - Those from the time before it was the the underdark * Fire - Those carved by the heat and magma * Hellian - Those caused by the course of the devils from the nine hellls
It is rumoured the waters of spirits (akin to the River Nyx) also runs through here