One of the bookcases in this library moves to reveal a secret door hidden behind.
This modern wall panel is actually a hidden door that’s completely concealed when closed.
This secret bookcase door adds an interesting flair to a home office.
This secret bookcase door conceals a hidden room. The fact that it’s at the end of a hallway gives it away, but only to those who are paying attention.
This secret bookcase door adds novelty and security to the residence.
This moving bookcase opens up to reveal a secret door on the upper level of this house.
These bookcases are mounted on track to fold in the middle and reveal a secret passage.
This secret trap door opens upward and can be locked from the outside.
This trap door leads to a secret room under Castle Menzies.
Many times stages include concealed trap doors like this to allow actors and actresses to move from one place to another.