Located in the eastern part of Tanaris, the Caverns of Time contain various portals to different key time periods and events in Warcraft history. The caverns act as a crossroads for the various timelines--through them one can travel back and forth along the ebb and flow of time. Old Hillsbrad Foothills is one of the timeways accessible in the Caverns of Time. The setting is seven years before WoW's present, to when the future Warchief Thrall was a slave of Aedelas Blackmoore, master of Durnholde Keep. The questing involves helping Thrall escape. The instance area in question spans from Southshore (where familiar personalities of WoW present can be found) to Tarren Mill.