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

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

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

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

These historic buildings once housed the headquarters of one of the most infamous gangs of New York.

A terrific purveyor of natural history objects and curios.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

The haunting history of a little girl lost.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

An arcade packed with a rotating collection of unique independent video games.

This 19th century brick building in Brooklyn stands out like the anachronistic landmark that it is.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

A lavender labyrinth so large it’s visible on Google Earth.