Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

A 12th-century fortress containing some of Berlin's oldest buildings.

A moving and macabre World War I-era painting by the great artist Otto Dix.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The bridge that cost Germany a World Heritage Site.

A famous big wave from Japan serves as a tribute to the victims of the disastrous Elbe flood.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

When the rain falls, this drain system turns into a musical instrument.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A mammoth WWII anti-air defense tower has been repurposed as a hotel with a rooftop garden.

A massive relic of the communist era of Berlin.

Check the time in 145 countries at once with this East German relic.

A small hippo-shaped fountain in Berlin, Germany.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

The world’s oldest military museum has remained largely unchanged since the last days of the Austro-Hungarian Empire.

Designed as a reminder of one of the darkest moments in Austrian history.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

The solemn exterior conceals an opulent interior of this 17th century church.

A silly medieval mural preserved on the side of a Viennese house.

Op-art architecture designed for happiness.