In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

A Serbian church lit by chandeliers made of weapons.

Featuring Zürich's only authentic 14th-century plague doctor's uniform!

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A former imperial sea-fortress and Soviet prison.

The Guardian of Tallinn.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

Flamboyant architecture from the turn of 20th century.

Ever-growing collection of devils in art.

A perfectly preserved hill village where the buildings are painted like white lace.

3,000 market stands in five former Zeppelin hangars.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

This micro-nation may be some sort of prank, but its constitution sure seems official.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

Where commuters walk through remnants of an ancient Greek necropolis.

Large collection from the 3rd millennium BCE.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

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

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

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

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