An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

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.

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

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

An existential riddle in the world's largest ancient castle.

The oldest garden in Prague, once part of an medieval orchard.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Pop culture has helped to keep this iconic British building from being destroyed.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Giant, friendly pelicans in Central London, the most unlikely of places.

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

The remains of Crystal Palace Great Exhibition of 1851.

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.