This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

At 207 feet, one of the world's longest continuous escalators.

Art and armour fill every inch of this rich kid's Italian villa.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Dim sum, served in a grand old theater.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

A naturally mummified 2,000-year-old man.

This giant Christ took first place in South America's religious arms race.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A nostalgic bibliographic gem.