Hidden passageways are concealed corridors, tunnels, or other routes that can be used by those who know of their existence to escape, enter, or spy. Fictional hidden passageways are often concealed behind a hidden doorway, and may be crawlspaces, underground tunnels, little known cave systems or other means by which a person can move between locations. Hidden passageways are used by assassins, spies, and people in the middle of realizing their newly purchased home contains a few dark secrets.
Designing Fictional Hidden Passages
Hidden passages that remain hidden are not as interesting. Consider who knows of them. There may be records of their existence in old architectural plans or dusty maps. Someone may have built the passage as an escape plan or found it while playing as a child.