Transylvania was a country located on Earth which later became part of Romania.
In the 9th century, Fenric transported Ingiger from the far future to Transylvania. (TV: The Curse of Fenric)
In the 15th century, Transylvania was ruled by Dracula. (AUDIO: Son of the Dragon)
In 1897, Count Frederick von Dracula travelled from Transylvania to London to confront Bram Stoker, the author of Dracula, which he felt dishonoured his family name. Stoker was saved by his wife Florence, who summoned a flock of bats to carry Dracula back to Transylvania. (COMIC: Bat Attack!)