A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A museum in the childhood house of a medical pioneer.

A Hungarian pharmacy museum with a box full of mummy powder.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

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

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

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

The topiary maze at the Habsburg hunting lodge.

Apartment complexes built into huge repurposed natural gas tanks.

This museum promotes informed contraception by documenting its often secret past.

One of the best collections of wax anatomical models in the world.

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

The Habsburgs' royal collections of art and wonders.

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

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

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

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

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

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

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

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

Op-art architecture designed for happiness.

Macabre museum devoted to historical Viennese murders.