Once America's longest-manned military fort, now an abandoned hulk.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

An unusual round church in London with a Templar past.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A beautiful but toxic fountain of mercury.

This South London cemetery holds the remains of more than 15,000 people.

New York's oldest magic store.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

Extraordinary sculpture garden created by an eccentric English poet.

The anatomical-pathological collection of a man who changed surgery.

The most alien-looking place on Earth.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Surreal riveted sea forts once protected the Kent shores from German attack.