Located in the Alopia Rift, Quarren City consisted of a series of disc-shaped structures along the ocean floor around volcanic vents. Illuminated by green lights, the dark city supported the mining operations of Quarren Industrial, and housed their Headquarters.
During the Clone Wars, Quarren City was the Separatist staging ground prior to the second battle. Riff Tamson led the attack on Coral City from the headquarters here.
- Strongholds of Resistance