This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

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

Commemorating the spot where the famous scientist fed his pigeons.

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

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

A statue paying homage to a world-record-setting aviator who disappeared under mysterious circumstances.

Beachcombers have been populating this museum with artifacts ranging from prehistoric to barely historic since the 1930's.

This strangely dressed taxidermy creature has a heartbreaking story.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

This skewed English house has looked like it's going to fall over for centuries.

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.

Today, Kent's medieval monarchs hold court on a busy pedestrian thoroughfare—or at least their statues do.

One of England's most famous churches hides a pair of little known architectural treasures.

This inn of the court provides a fascinating window into London’s legal and architectural history.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The monster at the center of the Darwin Center Spirit Collection.

Repository for more than 22 million pickled specimens.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.