Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The largest stretch of the Berlin Wall is right on top of the former SS headquarters

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

Tiny memorials honor individual victims of the Holocaust.

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

Cold war icon and onetime "hole" in the iron curtain.

An empty bookshelf commemorates the books which were lost during the infamous event

Single runway interrupted by a busy road that cuts across its middle.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

The longest and tallest aqueduct in Britain can actually be sailed across.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

The heroic tale of a remarkable pup who refused to leave her master's side, no matter what.

The wreck of a B-29 Superfortress now stands as a memorial left in the moors.

Sip mead from an East Nashville apiary while snacking on barbacoa tacos.

The spectacular collection of one of the world's best woodcarvers.

An elegant sandstone stairway built by the WPA still connects two neighborhoods in Akron.