The deepest metro station in the world.

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

When you've got to go, you've got to go.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

This attraction was abandoned after the Chornobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

One of downtown Berlin's last reminders of its Communist past.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

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

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

Time stands still at this serene burial ground in the center of Budapest.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.