Alater-ka
this was the only permanent underground city and spaceport found on the planet Barab I. It was crude by most standards. It was built by Shaka-ka to honor Imperial Captain Osted Alater, who exposed the deception of Planetary Safaris, which had been hunting the Barabels despite their intelligence. Years later, the spaceport and the surrounding city - as well as the entire surface of Barab I - were destroyed by the Yuuzhan Vong. Note that Geonosis and the Outer Rim Worlds indicates that Alater-ka was actually built by Captain Alater, to facilitate the Empire's operations on Barab I and to help ensure the protection of the Barabel race.