The continent of Xen’drik is a massive landmass that exists south of the continent of Khorvaire. It has recently begun to be explored by agents of the Four Nations in hopes of making profit from the relics found there amongst other natural resources.
Xen’drik was formerly inhabited by the Giant civilization that fought against the Quori and later a revolt of their slave Elves. The giant civilization was destroyed by the Dragon population of Argonnessen when they attempted to use their highly advanced devices on the elves.
Xen’drik is now a continent inhabited by drow, degenerate Giants, and many types of monsters. It is a wild and untamed place with fabulous eldritch machines available to found along with unimaginable treasures. It is still largely unexplored.
For more information: Eberron Wiki