This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

Little Red Lighthouse under the George Washington Bridge.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

A beautiful, historic location open to the public.

Series of storm drains connected to a dark urban legend.

A World War II-era submarine is stuck in the mud in New Jersey.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The real-life site of Ichabod Crane's infamous gourd attack.

A whimsical monument deep in this park commemorates the groups that helped build it.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

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.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.