The "Bubble Cliffs" were a tourist site that was located in Nezmi, on the planet Qiaxx. They were composed of a series of interconnected caves that formed as bubbles. The bubbles were each between five and thirty meters across, and served as shelters for Nezmi's early indigenous sentient population. These ancient dwellings were later restored according to archaeological evidence for historical purposes; the cliffs could be visited via daily airspeeder tours.
Shortly after the Battle of Endor, the caves served as the secret headquarters of the Black Nebula criminal organization.