The whole world in one water tank.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

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

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A hidden alley in urban Baltimore is a haven for graffiti artists.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

This free, take-a-book shop seems like a trick but isn't.

The trials and tribulations of marking Poe's grave.

This small-town pizzeria won the Hollywood lottery.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Dramatic river bend surrounds a natural red-rocked pedestal.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Location of a reliquary containing bone fragments of 18 saints.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

This museum explores the grim reality of life in the earliest British colonies in America.

At 207 feet, one of the world's longest continuous escalators.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.