Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

A perfect replica of the beloved show's first set.

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

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

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

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

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

The home, museum, and death site of Kodak's influential founder.

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

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

World's largest herd of white deer populate a former U.S. Army depot.

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

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

This abandoned factory on the Hudson River once churned out a million bricks a week.

There must be a pun in this haystack somewhere...

A mysterious echo seems to defy the laws of acoustics.