Old research facility on Mustafar

This is old research bunker said to date all the way  back to the ((Old Republic)). It's long deserted but people have heard stories of strange creatures and agressive guard droids inhabiting it now days.

During the Galactic Civil War, the droid known as HK-47 transfered itself to this facility, and employed an individual to travel to the Droid Factory and re-activate it.