Hogwarts

Hogwarts was a location in the Harry Potter books.

While in 1900 London, the First Doctor made a comment about Hogwarts, then noted that no one would appreciate his reference for almost a century. (PROSE: A Big Hand for the Doctor)

On a planet of fiction created from her mind, Martha Jones and the Tenth Doctor ran through Hogwarts. (PROSE: The Mystery of the Haunted Cottage)

Clyde Langer told Rani Chandra that he thought Ashen Hill Manor was like "Hogwarts Tim Burton Style". (TV: The Eternity Trap)