A French bistro in Brooklyn contains a lofty secret.

Patrons can find Chez Moi on 135 Atlantic Ave., but what awaits them on the inside may contain more than meets the eye.

Behind a bookcase inside the restaurant hides a passageway back in time.

Inside the underbelly of New York City's oldest Subway tunnel sits Le Boudoir, a 17th century themed bar.

Paying tribute to French royals like Marie Antoinette, the speakeasy treats patrons to a spectacle of the high life.   

They serve up a wide variety of beers from a tap shaped as a bronze bust of the French queen.

They also offer cocktails made with scotch, banana and honey.