The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

From scholastic to sepulchral - now under reconstruction.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

The first and only carousel with a lineup entirely of insects.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

A winding, cliffside stretch of road overlooking the Delaware River.

The famous author's cottage hideaway.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

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.

A former connection to City Island, it has been abandoned since the 1930s.

The loneliest island in New York.

The last standing puppet theater on Long Island.

This museum on a college campus pays tribute to the Arctic and to two explorer alumni.

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

Six peaceful acres in a residential neighborhood dedicated to art and peace.

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

Tucked away in a corner of a Maine general store there was a museum devoted to an equally beloved and reviled local soft drink.

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