A humble plaque marks the site where the country music legend was found dead in his Cadillac.

The highest point in Maryland is only accessible by hiking through another state.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

An abandoned stretch of highway, deteriorating next to the operational one.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

Two dozen pinball games hidden away inside a most unlikely location.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Once America's tallest structure, now a Baltimore landmark.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

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

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

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

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

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

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

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

This pun was simply waiting to come to life, and one defense contractor made it so.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.