An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

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

America's first serial killer rests in anonymity.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Pennsylvanian mass grave and possibly mass murder.

Destructive children, start your engines.

An ancient cemetery with some historic bodies underfoot.

This historic Rhode Island mini-cemetery features a number of headstones run through with mysterious holes.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

A mysterious air force base built to resemble a Long Island fishing village.

This backwater graveyard in the Hamptons became a trendy burial spot and posthumous status symbol for famous artists.

This private island is still in the family after a 400-year history including a witch hunt and a pirate.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

A large camera obscura, constructed entirely from digitally fabricated components.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

This forgotten graveyard in rural New York State once served a pioneering hospital.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

This derelict building used to house infirm Freemasons, their widows, and orphans.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.