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

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

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

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

The topiary maze at the Habsburg hunting lodge.

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

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

This former insane asylum now holds a pathological anatomy museum.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

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.

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

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

Dine amidst exotic plants at this former royal greenhouse.

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

An exquisite Baroque church in Vienna's old town.

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.

Macabre museum devoted to historical Viennese murders.

The beautiful baroque library of the Hapsburg empire.

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

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

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

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