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

BDSM, 1930s Style.

Paris' linguistic guide to the international language of, yes, love.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The narrowest street in Paris.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

A stunning garden filled with fantastical environmental folk art and sculptures.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

Where Eunice Williams was murdered by natives, and where locals say her ghost still haunts.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A mysterious echo seems to defy the laws of acoustics.

Of all the unique artifacts inside this library, a mummified hand stands out among the others.

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

This urban oasis is a marvelous meld of music and landscape architecture.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The massive Roman arch in New Hampshire that was meant to be a tomb.

A cable-suspension footbridge that hangs high above the Mill River.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

A giant toy jack made of numerous welded-together fire hydrants.