An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

World's first "penitentiary," meant to be humane, drove men insane.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Eighteen miniature death-scene dioramas.

A museum dedicated to exhibiting remarkable outsider art.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

One man's extraordinary topiary garden in a small South Carolina town.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

Moonbows over Kentucky.

The world's first time capsule lies behind a welded steel door in Atlanta.