Meetup with the Caravan (Alliance)

Speak with at Thistleshrub Valley in Tanaris.

The pyramid inside of the Maker's Terrace in Uldum can be used as some kind of super weapon that will end all life on Azeroth.

< thinks a moment.>

You need to continue the research you've begun. Head to the southern end of Kalimdor, to the desert of Tanaris. There's a caravan there that's about to leave for Uldum.

Perhaps you can tag along.

Harrison sent you, hmm?

How fortunate!

There's no friendly NPC offering to teleport players directly to her, so make the trek the old-fashioned way. Don't forget about the free teleport to the Caverns of Time from Shattrath City (reputation required) and Dalaran (no rep required). Don't forget about the flight paths on either side of the Valley of the Watchers either. The entrance to Uldum is not at the Valley of the Watchers, however. Head just northwest to Thistleshrub Valley and speak to Adarrah.