Unicomplex
The Unicomplex is a location in the fictional Star Trek universe. It is located in an unknown area of the Delta Quadrant, and is the closest thing the Borg have to a homeworld. It is the center of all processing activity for the Borg collective, and is the home of the Borg Queen. The Uni-Complex resembles a patchwork-like collection of thousands of cubes, connected by assorted conduits and transportation hubs. Borg cubes frequently cross into and out of the Unicomplex on their way to other parts of the galaxy.
In 2377, the Unicomplex was destroyed when a future Admiral Kathryn Janeway unleashed a virus within it, which spread throughout the complex and caused it to self-destruct.