Dark Portal

The Dark Portal, as seen in the Black Morass.

The Dark Portal is the gateway between Azeroth and Draenor located within the Blasted Lands that facilitated the first conflicts between orcs and humans. Orginally created by a joint effort between Medivh, possessed by the Dark Titan Sargeras, and the warlocks of the Shadow Council, the portal allowed the Horde to invade the world of Azeroth.