Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

A rebuilt Roman city that was once the largest Roman settlement in the region.

The final resting place for the remains of 143 Habsburg royalty.

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

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

This museum is dedicated to the little known ancient Roman history of Vienna.

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.

Rediscovered underground chapel is one of the best examples of Gothic architecture in Vienna.

Op-art architecture designed for happiness.

Apartment complexes built into huge repurposed natural gas tanks.

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.

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

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

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.

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

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

An excavation site that signified Hercules in Pula, and a glimpse into the city's Roman history.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.