An eerie, existential museum dedicated to the author of "The Metamorphosis."

If they push on just the right spot, even the weakest person can move this titanic boulder.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

This professional clown's home is an outsider art wonderland.

Beautiful carved tunnels.

One woman's decades-long obsession with the "La Fée Verte."

A font of vintage porn on the silver screen.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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

Paris' linguistic guide to the international language of, yes, love.

Notorious artist squat renovated into legal studios.

The grandest stage for the world's foremost masters of invisible instruments.

More than 200 eclectic sculptures surround the artist's home.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

Finnish lake, and scene of an infamous murder mystery.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

This lake-bound geographical marker sits at the point where three European countries intersect.