Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Explore the dark underground corridors of this graffiti-covered former military fortification.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Try not to get slimed in Tribeca.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

A World War II-era submarine is stuck in the mud in New Jersey.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

There must be a pun in this haystack somewhere...

New York City's smallest piece of private property.

Recovered suit of a cannibalistic West African gang.

The largest whale museum in Europe allows visitors to walk among life-size giants.

A winding, blood-red tunnel of hardened lava navigable by foot.

This fantastical waterfall is hidden in a cave located in a cracked cliff.