Sniff the Titan Arum's rotting flesh.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

New York City's smallest piece of private property.

Famously misunderstood wonder of the ancient world

Abandoned railway line circling the city of Paris.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Tucked in the back of this amazing antique store is an important piece of medical history.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This landmark building is now a vibrant performing arts space with musical acts from around the world.

The oldest living organism in New York City. Maybe.

The world’s largest collection of Tiffany glass sits in a warehouse in Queens.

The Vatican of the movie industry turned into an actual church.

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

The final resting place of the great escape artist, where some still gather to wait for his escape from death.