The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The oldest inn in England served brew to the crusaders.

Spend the night in this formerly abandoned traditional Scottish village.

Pennsylvanian mass grave and possibly mass murder.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Where America's first doomsday cult awaited the end of the world.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A rare view of a preserved Victorian science museum.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

An acoustic anomaly with a mysterious cause.

From scholastic to sepulchral - now under reconstruction.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A very classy 1920s-era bar right in Grand Central Station.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

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

A dilapidated dock tells the story of Titanic's missed arrival.