The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A reproduction of earth's many biomes.

A museum dedicated to the alleged Roswell Incident.

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

The magic's in the hole!

Resting place of Hollywood's immortals is also site of summer film screenings.

A giant Troll lurks under one of Seattle's oldest bridges.

Famously misunderstood wonder of the ancient world

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."