Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

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

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.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Sniff the Titan Arum's rotting flesh.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A semi-scholarly approach to sex.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

One part local history, 99 parts gruesome haunted house.

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

100-windowed castle turned art gallery, built by one dedicated mason.

An art world insider finds himself battling for his artistic home.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

This collection of French root art looks like an indoor fairy wonderland.

A self-built mosaic house and sculpture park.

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

Beautiful carved tunnels.

The fantastic architectural models of a French traveler.

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

A museum of magic with a Sadist past.

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