Marb Station

Marb Station was part of UK Habitat on Ravalox. The Sleepers created an underground refuge there where they could hide in suspended animation with the information they had stolen from the Matrix. They set up the robot Drathro to guard them, with a group of humans (which it called "work units") to help. The station was powered by a black light converter on the surface. When the Sixth Doctor and Peri saw the Marble Arch, they realized they were on Earth in the far future, and that Marb Station was the remains of the Marble Arch tube station. (TV: The Mysterious Planet)