The Almas Sith fortress is located on the planet Almas in the Cularin system. It was built by the Sith Lord Darth Rivan. The 30-meter-tall fortress is completely black, has no visible entrances or windows, and sensors are not able to probe it.
The terraforming plant kaluthin created by Darth Rivan grew all over Almas except for a wide area around the fortress, creating a large desert with the fortress as a focal point. It is considered a very strong focal point for the dark side.