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

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Nikola Tesla's former home contains an homage hidden from plain sight.

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Relics given to a Manhattan church to avoid seizure by the Italian government.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

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

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

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.

New York City's only preserved family home from the 19th century.

The famous author's cottage hideaway.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

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

A bit of retro transportation flair preserved in the world's largest department store.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.