Washington's iconic carousel has a nice piece of Civil Rights history.

The "lovely red Vega" of the legendary record-settling pilot.

Wedged between two sets of row houses is an awkwardly located family graveyard.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

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

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

Remnants of a storybook amusement park hidden behind a strip mall.

A collection of artifacts from Maryland's maritime past.

The Decoy Capital of the World.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

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

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

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

The land is home to swimming ponies and a legendary 18th-century treasure.

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.