Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

A national collection of Communist-era musical posters.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The room where Vincent van Gogh died.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A charming flea market shop dedicated to retrofuturistic apparati.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

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

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

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

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

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

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A series of abstract, silly sculptures represent the works of a great modern classical composer.