The fifth tallest statue in the United States is a shirtless monument to the oil worker.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

An acoustic anomaly with a mysterious cause.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

The pioneering photographer's prints are immortalized inside her childhood home.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

A vintage video game wonderland in downtown Reykjavik.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

Hundreds of antique bank vault locks on display in New York City.

Visit the monolithic tomb of America's most famous general.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The world's oldest bookshop still in operation.

The Habsburgs' royal collections of art and wonders.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.