Zul'Farrak

Zul'Farrak, pronounced [ZOOL-fah-rawk], is a Sandfury troll city[1] located in northwestern Tanaris. Remember to pack your sunscreen and get ready for a battle royale with the Sandfury trolls.

History
From Blizzard's Official World Dungeons site:

''This sun-blasted city is home to the Sandfury trolls, known for their particular ruthlessness and dark mysticism. Troll legends tell of a powerful sword called  [Sul'thraze the Lasher], a weapon capable of instilling fear and weakness in even the most formidable of foes. Long ago, the weapon was split in half. However, rumors have circulated that the two halves may be found somewhere within Zul'Farrak's walls. Reports have also suggested that a band of mercenaries fleeingGadgetzan wandered into the city and became trapped. Their fate remains unknown. But perhaps most disturbing of all are the hushed whispers of an ancient creature sleeping within a sacred pool at the city's heart - a mighty demigod who will wreak untold destruction upon any adventurer foolish enough to awaken him.''

With the Rise of the Zandalari patch (4.1), it is stated that Zul'Farrak is now a wasteland.[2] It's possible that the Sandfury have since been wiped out, although the statement may instead refer to 'Zul'Farrak' as a larger region, similar to Zul'Drak and Zul'Aman, and means the Sandfury's former empire across much of Tanaris. Alternatively, it might mean that the Sandfury are now simply in such low enough numbers that the other troll tribes consider theim effectively extinct.