This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

A museum dedicated exclusively to aircraft used in the military.

This sprawling museum holds one man's giant collection of real tanks.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The resting place of a Civil War celebrity's amputated limb.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

America's first public mental health facility.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Outsider art meets paleontology at this roadside reptile repository.