Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

Dating to 1793, this is the oldest building in Poolesville.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

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

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

Exact replica of the ancient monument, but much, much lighter.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

This Federal-style plantation house was once visited by Abraham Lincoln to meet with generals during the Civil War.

Oldest unrestored plantation house in America that is open to the public.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

One street divides a single town that stands in two U.S. states.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

This derelict building used to house infirm Freemasons, their widows, and orphans.

The real-life site of Ichabod Crane's infamous gourd attack.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.