Ruins of Uldum

Ruins of Uldum is a subzone of Tanaris. It is an ancient hall of stone located in the southern desert of Tanaris, in the Valley of the Watchers. It is full of Sandstone Earthen, who are immobile (if unprovoked) and malfunctioning. The western side of the room has been damaged, revealing a titan device. The Antediluvean Chest can be found in the back of the room. Tampering with the chest summons the Antechamber Guardian. The area appears to also be known as the "Antechamber of Uldum" and may have once been the grand entrance to Uldum itself. The quakes that ripped its doors open probably collapsed the tunnels. If the path was not blocked off, the tunnel would lead to a smaller door at Cursed Landing.

History
When the world was sundered by the Well of Eternity's implosion, the earthen were deeply affected. Reeling with the pain of the earth itself, the earthen lost much of their identity and sealed themselves within the stone chambers where they were first created. Uldaman, Uldum, Ulduar... these were the names of the ancient Titan cities where the earthen first took shape and form. Buried deep beneath the world, the earthen rested in peace for nearly eight thousand years.

Revelations
The Stone Watcher of Norgannon claims that entry into the Uldum compound is only allowed for beings that have the Plates of Uldum. It also claims that Uldum is a research facility for the titans in their continuing efforts to enhance the biosphere of Azeroth.

Cataclysm
Prospector Gunstan studied the gate here for years, trying to find a way of entry that wouldn't disturb any of the ancient architecture just behind it. However, the Cataclysm has destroyed the gate, and the entrance to Uldum is revealed.