The Dungeon at Fablehaven is located in the basement of the Main House. It is locked behind an iron door and contains numerous dangerous foes, such as Imps, although, most of the cells are empty. In one corridor a bloodred door stands, behind it is the Hall of Dread. Inside the Hall of Dread is a lot of Wraiths, Phantoms, and Specters imprisoned. At the end of another, much smaller passage, lies the Oubliette, a circular room that contains the Jinn that turned Ruth Sorenson into a chicken. If you head of into a passage from the main corridor, you'll find the Quiet Box. The original prisoner of the Quiet Box at Fablehaven was Navarog, the Demon prince, but later it changed to Vanessa, and then a stingbulb version of Kendra.