June 23, 2012 Add as a preferred source on Google Add as a preferred source on Google Sure, we've all heard about the book safe trick where a hole is cut into a book to hold money or hide rock hammers ...

July 5, 2009 Add as a preferred source on Google Add as a preferred source on Google Who hasn't dreamed of having a mystery-story-style secret passageway? While a trick bookshelf is pretty awesome in ...

We may receive a commission on purchases made from links. Buildings with hidden spaces have long been a subject of public interest, with plenty of real-world history from ancient Egyptian tombs, to ...