Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Winding country roads in eastern West Virginia lead to an extraordinary place populated by fiberglass giants.

The oldest existing one-room brick schoolhouse in Loudoun County.

Designated as an Underground Railroad research site.

The hulking remains of the Leesburg Lime Company Kiln lie dormant behind a historical marker close to the W&OD trail.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

These unusual rooms on wheels are holdovers from the 1960s.

Where pardoned turkeys once spent their all-too-brief final days.

One of the only memorials dedicated to journalists who died in combat.

Built by the patriotic residents of Boonsboro in a single day.

Bizarre Cavern.

A monument marks the location of the first successful steamboat demonstration.

True to its name, this little house presents like a dollhouse, and surprising details are revealed with a quick peek through the window.

The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

This general store is more than a century old and home to various oddities and antiques.

A former pillar of the Black community in Ellicott City.

This striking Victorian Home with its 113-foot turret is best known as the site where abolitionist John Brown was executed in 1859.

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Time travel with sweets across history at this research-based candy store.