If one day I were to discover a secret hidden door in my home, I am confident that it would lead to a small, unoccupied room that is located underground and is kept from everyone else in the house.  If I were to come across such a location, I would keep it a secret from everyone. I think it would be better for me to convert it into a cosy study nook where I can spend time reading. I would adorn the area with hand-made crafts and fairy lights, as well as a small bean bag chair and a rug for added cosiness. If no one were around, I could spend a good portion of each day here reading without being interrupted.