The Doctor's office (The One)

The Doctor had an office in his TARDIS that resembled the secondary control room used by the Fourth Doctor. The office contained the Fourth Doctor's clothing, a painting of the Mona Lisa, a bust of Morbius, a headless K9, jelly babies from the "late 70s", a box labeled UNIT, and a map to Shada.

The Eleventh Doctor later revisited this "old office" that he "always meant to tidy up" to find his map to Shada. (COMIC: The One)