The White House is one of the few residences of heads of state that is open to the public. However, in addition to accommodations that anyone can visit, such as the Lincoln Bedroom and the above-ground pool, the White House contains many secret rooms. Here's a look at some of the most sensitive:

The Sub-Basement: This contains not only a bomb shelter, a swarm-of-bees shelter, and a titanium helmet that stops psychics from reading the president's mind, but also the nation's priceless archive of Fleer's complete 1994 holofoil baseball-card set and a kidnapped army of George Washington's descendants.

The Secret Passageways: Many rooms of the White House include hidden tunnels, such as the passageway under the president's desk that links the Oval Office to Six Flags America in Maryland. These passageways are decorated with historical artifacts, including the original draft of the Constitution, which made holding hands in public a capital offense.

The Experimental Kitchen: Located beneath the public kitchen, this is where White House chefs keep the chickens that hatch fully cooked.

The Hidden Fane: To help him make decisions, the president deliberates in this secret shrine that houses the bones of every former president, including those who are still alive. During the week that the president spends silently meditating in their presence, he is replaced by a hologram. That is why it is common to poke the president upon meeting him.