The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

The modern birthplace of Irish freedom.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This former steel and coal plant is now a neon-lit industrial fantasia.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This concrete residential area doubles as an open-air gallery.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Berlin's old airport.

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

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

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

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

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.