Crystal Bucephalus

 was part restaurant, part time machine. Turlough and the Fifth Doctor once visited it. By lowering the diner's reality quotient, they could be sent into the past to eat at fine restaurants without causing alterations in history. (PROSE: The Crystal Bucephalus)

Behind the scenes

 * The precedent article the is never capitalised in the book, making it possible to believe that it's not actually a part of the name. However, it is used every time the restaurant is named. Therefore it is practically a part of the name, in the same way that the precedes the Doctor, the Master and the Rani.