Borg transwarp hubs were large structures built by the Borg Collective which marked entry-points to transwarp conduits capable of pushing starships to extreme velocities not normally achievable by warp drive. At least six transwarp hubs were known to be located in the Milky Way Galaxy.
Beta Quadrant HubEdit
The Federation captured a transwarp hub near Unity One Starbase in mid-2384 during the Borg Elimination Incident. Scientists worked on reverse-engineering the technology for over two years, but due to damage the hub sustained in the incident and problems with Borg technology, only a handful of transwarp portals were re-activated. This included one portal leading to Euronda Station, a small Iconian space station on the edge of the Andromeda galaxy, and one to Unimatrix One. (Star Trek: Unity (fan film series))