Abandoned concert venue legendary for its rock counterculture.

The 606 is a decade in the making.

A Beaux-Arts triumph set to become Ford's innovation campus

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

An abandoned relic of the city's failed experiment with below ground transit.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

The bones of an old zoo crumbling in the shadow of a new one.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

Cold War missile launch site which has been converted to a public park.

If astronomy had a ghost, it would look like this observatory.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

A theater sits abandoned on Roosevelt Road, once majestic in splendor, now majestic in decay.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

This abandoned 19th century orphanage started as a boarding school for children of Civil War veterans.

The museum moved on, but the diorama remain.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

This empty Detroit high school was too expensive to maintain or destroy.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

This overgrown Illinois water park offers a whole new type of adventure.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.