Orgrimmar Tunnels



The Orgrimmar Tunnels are a series of tunnels that run underground Durotar, starting outside of the orc city of Orgrimmar. Gazlowe and his goblins dug them out in search of a reliable water supply for the Horde's new city. However, they mined directly to a kobold den, which put a halt to the operation. The kobolds was later routed by Rexxar and his companions, and the breaches into the dens were closed off, after which Gazlowe and his employees could finish their task. Rexxar also encountered an isolated group of wildkin within the earthen passageways.

Speculation
It is unknown in which direction the Tunnels run, althouth they were likely dug to be closer to much of Orgrimmar than the Southfury river, the closest above ground water-source. The enterance to the Tunnels may now even be within the city proper, as the city walls had yet been constructed when digging began. The Tunnels may connect to the underground ruins of Gazlowe's Excavation Site, or to any of the other caves in Durotar (even to the volcanic Ragefire Chasm beneath Orgrimmar). With the Cataclysm, a spring has erupted from the cliffs above Orgrimmar's Valley of Wisdom, which could mean that the water sought by Gazlowe does indeed run under the city.