Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

One man's lifelong obsession with death.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

Townhouse facade doubles as an RMS Titanic Memorial.

Check your calendars; you might be attending a drive-in movie or sitting next to a fashion runway.

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

Walk over a 150 year old manhole.

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

The factory that helped produce a dominant form of lighting before Thomas Edison.

Retribution for death of infamous mob boss Franie Yale was a case of mistaken identity.

This slender three-story building has also had several famous residents.

The site of one of history's most indelible and horrific tragedies.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

An abandoned stretch of highway, deteriorating next to the operational one.