The site of an ancient Mississippian settlement that appears to have flourished during the 10th to 13th centuries.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

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

The unusual medical inventions of the man who gave the world Corn Flakes.

No one knows how many bodies are in this vault in a Chicago public park.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A bit of retro transportation flair preserved in the world's largest department store.

The "Seinfeld" diner.

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

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A layered tribute to the work of mosaicist Isaiah Zagar.

How did a French journalist’s grave become the sexiest statue in the cemetery?

19th century pendulum and a clock restored by a rogue group of guerilla artists.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The oldest stone house in Paris was built by its most famous alchemist.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

First planned industrial community in the United States.

All of Chicago's wood-paved streets are long gone but two alleys remain.

A speakeasy takes on Chicago's drinking culture.

This shop for all your super spy needs hides an educational secret.