A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.

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

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

A semi-scholarly approach to sex.

A huge resale shop for the cast-offs of the film & television industry.

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

A veritable variety of odds and ends.

Recovered suit of a cannibalistic West African gang.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Unrepaired walls from a 1920 anarchist bomb attack.

This collection of grinning ephemera has grown from basement to Brooklyn.

Unique antiquarian shop specializing in globes, maps, and prints.

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

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

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."

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A hands-on traveling collection of the innovative devices of yesteryear.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.