A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

This might just be the TARDIS of bookstores.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

The house where John Wilkes Booth conspired with his co-conspirators.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Home to items never before seen by the public.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

A Civil War Museum with some notable medical antiques.

This former asylum for Black Americans is haunted by its history of violence and racism.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

The land is home to swimming ponies and a legendary 18th-century treasure.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Eighteen miniature death-scene dioramas.

Nuclear reactor created the plutonium used on Nagasaki.