Mills Mausoleum


 * image = Frealm2x05.png
 * status = Unknown
 * Hearts inhabited = The Huntsman
 * visitors = The Huntsman
 * Jefferson
 * Henry Mills
 * David Nolan
 * Captain Hook
 * Cora
 * firstappearance = The Heart is a Lonely Hunter}}Regina's Vault is a location featured on ABC's Once Upon a Time. It first appears in the seventh episode of the first season.

One of the magic realms accessible by Jefferson's hat is the unnamed realm in which Dr. Victor Frankenstein resides. Though stated by Dr. Frankenstein that magic doesn't exist in his world, the fact that it can be reached by Jefferson's hat means that it at least has a form of magic which isn't considered as such by the doctor. However, given that Victor strongly believes in science, he may have been exaggerating.

History
Asked by Rumplestiltskin, the Mad Hatter travels to this world to bring back Dr. Victor Frankenstein. However, Rumplestiltskin let the Evil Queen  think it was her idea to bring him to Fairytale Land, in order to bring her lost true love Daniel back from the dead.

Actually, the Doctor only goes to Fairytale Land to push the Evil Queen further towards darkness by pretending to fail to bring Daniel back. His agenda in that world is to obtain a heart that had been enhanced by being removed from a chest by Magic.

Back in this world, the Doctor is greeted by his assistant. With the final piece to his puzzle, Dr. Frankenstein is  now able to revive his brother. He proclaims that this is not an act of Magic, but an act of Science ("The Doctor").

Ways to Travel to Frankenstein's Realm

 * It can be assumed that there's a door in the Mad Hatter's Hat that reaches this land. ("The Doctor")

Trivia

 * Aside from the beating heart, everything in this world appears to be filtered in black-and-white, referencing the original Frankenstein movies.
 * Show writers Edward Kitsis and Adam Horowitz stated in an interview that while writing the script they referred to Frankenstein’s world as “a land without color”.