An exquisite Baroque church in Vienna's old town.

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

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

An ornate private entrance to the Vienna subway built specifically for the emperor.

The topiary maze at the Habsburg hunting lodge.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

The first modernist church in Europe.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

A gift from Emperor Franz Joseph I to his wife.

This cubist Vienna church building looks like some sort of alien stonehenge.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

Apartment complexes built into huge repurposed natural gas tanks.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

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

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

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

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

These relics of the city's past now exist as a prominent modern feature.

Op-art architecture designed for happiness.

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

A spherical "micro-nation" in the heart of Vienna.

Macabre museum devoted to historical Viennese murders.