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

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Electrical curiosity museum housed in an old transformer station.

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

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

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

Op-art architecture designed for happiness.

The house that took a plunge into the facade of a museum.

More than a millennium's worth of municipal records preserve the political history of Austria.

The first modernist church in Europe.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Apartment complexes built into huge repurposed natural gas tanks.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.