Lethlor Ravine is a wide craggy valley located in eastern section of the Badlands. It is populated with dragon whelps and drakes from the black dragonflight, and contains several crystalline obelisks that are part of a quest chain.
In the RPG
Lethlor Ravine is a desolate area in the eastern Badlands inhabited by black drakes. Before Ragnaros' summoning, this was a beautiful, verdant region of the Redridge Mountains. Now dragons, agents of mighty Nefarion roam the area spying on the Dark Iron dwarves who seek to overthrow Nefarian's control of Blackrock Spire.