The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A modern zoetrope on the New York City subway.

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

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

The remains of a 19th century spring, and the site of an infamous unsolved murder.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

The saddest little diner in New York.

Walk into the 19th century without leaving Brooklyn.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

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

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

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

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This abandoned subway station can still be seen on regular commuter trips.

A reminder to choose water over wine since 1888.

This former crime corner has been turned into an eclectic community center.

A long abandoned hospital building on the outskirts of NYC.

A burial ground of rusting metal grave markers.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.