The Machine

The Machine, a creation of Omega, was one of the earliest forms of TARDIS. The Other used it to get Patience off ancient Gallifrey.

Description
The Machine was primarily a column, nearly a mile tall, with ten metre-thick cables spilling out of it. While mostly grey, some of its panels had been removed to reveal yellow and orange light sources. The cables and power couplings had grown out of the Machine in an organic fashion over the millions of years it had lain buried under the ice of a remote planet. At its base was a door to a small antechamber that functioned as a control room. The Machine was dimensionally immanent: it was smaller on the inside than the outside. (PROSE: Cold Fusion)

Behind the scenes
The description of the interior of the Machine resembles the interior of TARDIS seen in the film Dr. Who and the Daleks.