Ratcatchers Mansion is an unofficial name given to a hidden manor near Ardougne. It is supposedly in a densely wooded area near the city, but players cannot see it normally. To get to the manor the player must follow directions given to them by Jimmy Dazzler as part of the Ratcatchers quest.
During the quest the player must make their way into the house, while evading guards, in order to catch six rats for Jimmy Dazzler, as the owner of the house wants the rats to be removed while a party is going on, and for nobody to notice.
- The inaccessibility of the mansion outside of the quest is an example of Scale theory, which describes the incongruity between the size of the game world and the actual canonical size of Gielinor in-universe.