The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Home to items never before seen by the public.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

The only surviving prototype for Buckminster Fuller's house of the future.

Yo, Adrian!

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The site of the climactic scene from the classic horror film is now a historic landmark.

Decades before the scandal, this staircase on the river was a literal "water gate."