Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

Annual technopop celebration of peace and love.

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

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

Apartment complexes built into huge repurposed natural gas tanks.

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

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

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

An exquisite Baroque church in Vienna's old town.

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

A silly medieval mural preserved on the side of a Viennese house.

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

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

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

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.

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

Op-art architecture designed for happiness.

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

The resting place for anonymous victims of the Danube's dark waters.

The topiary maze at the Habsburg hunting lodge.

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

The beautiful baroque library of the Hapsburg empire.