Learn about Iceland's hidden folk at this school dedicated to the study of elves.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

Reverend Jen's unique museum/living room showcases her troll collection.

A crumbling hospital from the 1850s on Roosevelt Island.

Hear the tales of New York's most notorious criminals.

The site of the deadly Triangle Shirtwaist Factory Fire.

NYC's legendary underground network for bovine transportation.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A hip bar decorated with walls of golden skulls.

From scholastic to sepulchral - now under reconstruction.

A living archive of urban activism and space reclaimed.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This little museum is built on a theater that was once a wildly elaborate speakeasy.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A bloodstain from "the wound of the transverberation of the heart."

A science teacher's dream.

These pretty kitties killed and ate as many as 135 railway workers.

A speakeasy takes on Chicago's drinking culture.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

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

A monument to the art of slicing people open.