An art installation commemorates journalist Nellie Bly's undercover reporting inside a New York asylum.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

An unassuming secret door once led to a legendary watering hole.

This was one of the first (and last) university-built and operated nuclear reactors.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

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

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The highest point on the island known for buildings that touch the sky.

Little Red Lighthouse under the George Washington Bridge.

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

A Manhattan Episcopal church with an eerie underground crypt.

Out of a labyrinth of abandoned tunnels and stops, this Queens subway station is arguably the most mysterious—if it exists at all.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

Final resting place of Typhoid Mary.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Ride the subways of yesteryear.

Nature and beauty amidst pollution and industrial wreckage.

This secluded ruin was once a home for exotic plants.

I fought the law and the precinct caved in.