A self-built mosaic house and sculpture park.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

A beautiful and classically designed villa, with an hourly infestation of monsters.

Monsters and miniatures are held in equal esteem at this wondrous museum.

These quaint French houses dangle precariously over a precipice.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

This massive blockhead sculpture hides an entire library.

Historic medieval fortified city in southwest France.

Science fiction's grandfather has a fittingly marvelous tomb.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

Every year, the town of Menton, France, turns lemons and oranges into giant sculptures depicting windmills, dragons, and more.

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

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

A suspended footbridge allows for traversing this gorge carved through the French Alps.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

This historic stone gate tower is now just a lonely relic in the middle of a swamp.

The remains of this castle, known as the Witch’s Eye, watch over the Thur Valley.