A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A museum of carnival attractions where you are invited to ride the rides.

This massive library holds what was once the largest book collection in the world.

Abandoned railway line circling the city of Paris.

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

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

What this Good Friday parade lacks in baroque filigree it makes up in somber gothic imagery.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.

This simple apartment may have inspired some of the most important theories in the history of science.

A mythically themed self-built sculpture park.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A constellation of golden cobblestones shows the names of local children born under a full moon.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.