Stockholm's narrowest alley is barely over two feet wide.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

An exquisite Baroque church in Vienna's old town.

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

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

The Habsburgs' royal collections of art and wonders.

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

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

Macabre museum devoted to historical Viennese murders.

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

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

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

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

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

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

Terrifying derelict military hospital once housed a recuperating Hitler.