Darth Sidious's secret facility was a remote base of operations controlled by the Sith Lord Darth Sidious. It was situated within an old mining area, close to a lava lake, on the southern side of the planet Mustafar. In the time of the Clone Wars, the bounty hunter Cad Bane brought abducted Force-sensitive children to this location. The Sith Lord intended to transform them into dark side spies. When Anakin Skywalker and Ahsoka Tano, two Jedi attempting to save the children, uncovered the base, Sidious and his nanny droids destroyed it.