Hidden Doors and Secret Passageways are always a cool amenity to any house. Not only does provide mystery to your living quarters, but it also allows for a bit of privacy. Hidden doors and secret passageways seem to be a popular room addition since there are numerous home security companies on the web who specialize in such requests, like The Hidden Door Company, Creative Home Engineering and Hide A Door. Of course, you can easily get the typical hidden door in a bookcase, but we\u2019ve found some pretty interesting ones below!\r\n20. Mirror Secret Door\r\n\r\n\r\nThis one is crazy! It looks like a regular wall-mounted mirror, but it slides open to reveal a whole other room!\r\n19. Faux Book Case\r\n\r\n\r\nJust because it looks like a dead end doesn't always mean there's nothing behind it...\r\n18. Hidden Mirror Vault\r\n\r\n\r\nThis is the best place to keep that stack of cash or gold bars you don't want the Uncle Sam to get their hands on! Oh, and you can easily use it to partake in your beauty!\r\n17. Anne Frank's Hidden Bookcase\r\n\r\n\r\nThis is one of the most famous hidden doors in history (at least to us). Anne Frank and her family were able to hide from Nazis during WWII for up to two years due to a hidden apartment behind a bookcase. This secret back door is one of the most monumental in our history.\r\n16. Bookcase Hidden Door\r\n\r\n\r\nAlthough it\u2019s not as original as some of the other hidden doors, it still pretty cool since it looks like a real bookcase that holds all sorts of random crap, but opens to a room. The above picture is one girl\u2019s secret study room.\r\n15. Staircase Hidden Door\r\n\r\n\r\nA hidden room under a set of stairs is definitely an unusual idea. The above photo is of a staircase that rises to reveal a hidden room.\r\n14. Under the Stairs Hidden Door\r\n\r\n\r\nHere\u2019s another hidden room under a staircase but instead of rising up to reveal the room, it opens like a regular door to reveal a hidden area.\r\n13. Pool Room Hidden Door\r\n\r\n\r\nThis is seriously something out of the game Clue! Now, we just have to figure out who the murderer is and what weapons they used...\r\n\r\n12. Secret Wall Door\r\n\r\n\r\n\r\nThe best hidden doors aren\u2019t even there to the naked eye, just like this one that looks like it\u2019s part of the wall, but opens to what seems like a rest room.\r\n11. Under a Mat Hidden Cellar\r\n\r\n\r\nThe Spiral Cellars design firm have built a hidden win cellar under a mat, complete with a spiral staircase that goes underground.\r\n\r\n\r\n10. Wine Rack Secret Door\r\n\r\n\r\nThis regular, fully functional wine rack has a secret door that leads to an entirely mysterious room.\r\n9. Stone Wall Secret Door\r\n\r\n\r\nThe stone wall looks like any regular wall, but behind it is another room that you would have never thought was there!\r\n8. Painted Wall Hidden Door\r\n\r\n\r\nTo the average eye, the painting looks as if it\u2019s merely on the wall, but to the person living in the house, it\u2019s a doorway to another room!\r\n7. Wardrobe Hidden Room\r\n\r\n\r\nIt\u2019s straight out of the Narnia novels where the wardrobe opens to reveal a secret room (or world)!\r\n6. Fireplace Secret Door\r\n\r\n\r\nThis fireplace opens to reveal a hidden passage and unless you knew about it, you would never be able to tell it was there!\r\n5. Brick Wall Hidden Door\r\n\r\n\r\nUnless you knew about it, you would have never been able to tell there was a hidden room behind this brick wall!\r\n4. Secret Garage Door\r\n\r\n\r\nDon\u2019t want people to know where you park your car\u2026no problem with a secret garage door that looks like another floor of your house!\r\n3. Han Solo Secret Door Bookcase\r\n\r\n\r\nThis one is so cool! It\u2019s a regular bookcase on the outside, but it opens up to a secret area and has Han Solo\u2019s image when he was stuck in carbonite!\r\n2. Library Secret Door\r\n\r\n\r\nThe others have just been small bookshelves, but this one is a massive library secret door with tons of move disguising the door opening that leads to a new room.\r\n1. Home Theater Ticket Booth Hidden Door\r\n\r\n\r\nThe Home Theater Ticket Booth Hidden Door from Creative Building Resources adds a hidden door to your home theater room by making it look like an old school ticket both. It features a programmable scrolling LED sign built into the top of the frame and functions like a ticket booth, complete with recessed lighting.