An oubliette is a type of dungeon. Oubliette can also refer to: Oubliette (The X-Files), an episode of The X-Files The Oubliette, a 1914 film starring Lon Chaney, Sr. The Oubliette, a spaceship-like prison that appears in Metroid Prime Hunters A Moving City of Mars in The Quantum Thief, a 2010 novel by Hannu Rajaniemi