Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Museum dedicated to the terror regimes of Hungary.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

One of Vienna’s oldest (and perhaps most haunted) alleys, allegedly with a bloody past that gave it its name.

Legends surround an ancient tree trunk riddled with nails for good luck.

These two 15th-century metal rods allowed people to check if they were swindled or not.

Sturdy scales are a surprising thing to find in a modern European city.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

Op-art architecture designed for happiness.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

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

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

Baroque celebration of the end of the Great Plague of Vienna.

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

The most beautiful Taco Bell in the world even has surfboard parking.

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

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

A historic and beautiful Art Nouveau chamber in a historic railway station.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.