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

The final resting place of a prominent Black American farming family sits in the shadows of an IKEA store.

The half-mile long structure is so impressive, it even shows up on satellite images.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

This unassuming Massachusetts residence was built with a trap door to hide escapees on the Underground Railroad.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

Resonating tubes make music from highway overpass.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Walk into the 19th century without leaving Brooklyn.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

The famous author's cottage hideaway.

Wine bottle sculpture with a ship's stateroom inside.