This lovely pocket park is one of the most under appreciated in D.C.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A crumbling hospital from the 1850s on Roosevelt Island.

Experience park where visitors are told to expect the unexpected.