An exquisite Baroque church in Vienna's old town.

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

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

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

The Habsburgs' royal collections of art and wonders.

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

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.

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

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

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

Op-art architecture designed for happiness.

The topiary maze at the Habsburg hunting lodge.

Dine amidst exotic plants at this former royal greenhouse.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

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

The beautiful baroque library of the Hapsburg empire.

The celebrated eyesore created by starry-eyed sweethearts.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This bridge was constructed from the rubble of the infamous Bastille.

This demon atop the Notre-Dame de Paris looks utterly bored.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

This Parisian gem is one of the most incredible ethnographic museums in the world.