Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

The site where Joe Gallo kept his guns, pet lion, and launched an all out mob war in 1960s Brooklyn.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

One of only two remaining Victorian-era greenhouses in New York.

Where infamous mobster and leader of Murder Inc. Albert Anastasia made his home.

Obscure and obsolete publications are given new life as works of art.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Final resting place of the immigrant who brought artificial seltzer water to America.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

The humble fort that saved Washington.

A world of whimsy and wonder aboard a one of a kind historic landmark vessel.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

Once America's longest-manned military fort, now an abandoned hulk.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

This park contains a number of standing stones meant to heal and inspire.

Dinosaurs, magic, and wonder are hidden amid the forests of Allaire State Park.

A unusual sanctuary for abused and exotic animals in South Jersey.

A "Bugseum" dedicated to all things insect-related resides behind a pest control company.

An allegedly cursed tree represents a town's reckoning with a racist past.

Beautiful stained glass depictions of the history of human flight fill this surprising chapel.

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

A scenic fort on the harbor protected Philadelphia from an attack that never came.