The Carte de Locales was the Crystal Bucephalus' database of fine dining establishments throughout history.
Before it opened, the owners searched through records of the Union for all mentions of places where food was consumed. They identified which were the best, and those restaurants and the time zones they were in where added to the database. With the Bucephalus' time travel ability, guests could dine at any of those places. When the Fifth Doctor, Tegan Jovanka and Vislor Turlough visited the Bucephalus sometime during the six or seventh century of the tenth millennium, there were one million and thirty-seven thousand, eight hundred and forty-one zones in the Carte de Locales. (PROSE: The Crystal Bucephalus)