Answer: dungeon

AnswerCrossword Clue
DUNGEONCastle keep.
dungeonto confine in an underground prison
dungeonstrong underground prison
DUNGEONCastle section
DUNGEON"The Count of Monte Cristo" setting
DUNGEONRole-playing game locale
DUNGEONOubliette
DUNGEONCastle area
DUNGEONKeep.
DUNGEONCastle cooler
DUNGEONPart of the Bastille.
DUNGEONBlack hole.
DUNGEONUnderground cell.
DUNGEONMedieval prison
DUNGEON"Count of Monte Cristo" setting
DUNGEONSpot for an iron maiden
DUNGEONWhere Dantes was held, in "The Count of Monte Cristo"