This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The oldest stone house in Paris was built by its most famous alchemist.

Abandoned railway line circling the city of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

France's most famous cemetery, with some of its most curious tombs.

Hungarian mummies in beautiful painted coffins.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

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

A forgotten graveyard lost in the tangles of an overgrown garden.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Budapest's Communist-era statues, banished to the suburbs.

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

A museum in the childhood house of a medical pioneer.

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

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Once the home of a hermetic monk, this cave now houses a small church.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

You can spend the night in Dr. Frank-N-Furter's castle.

The anatomical-pathological collection of a man who changed surgery.