Budapest

Budapest was the capital of Hungary. It was the location of the famous Buda Castle where Vlad the Impaler was once imprisoned. The river Danube flowed through Budapest. (AUDIO: The Labyrinth of Buda Castle)

The Fourth Doctor and Romana II encountered the vampire Zoltán Frid in Budapest in 1980. (AUDIO: The Labyrinth of Buda Castle)

During the Year That Never Was, Martha Jones claimed to have gone to Budapest to collect one of the vials of liquid needed to arm the gun with which she was allegedly preparing to kill. (TV: Last of the Time Lords)