This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

A decommissioned military complex that's now a modern industrial park.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

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

Final resting place of two dozen New York City harbor ships.

A town trapped in time - 1958 to be exact.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

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

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

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

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Little Red Lighthouse under the George Washington Bridge.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The most confusing clock in New York.

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

An easy to overlook storefront hides some of the most authentic and regionally diverse Chinese food in New York.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Once America's longest-manned military fort, now an abandoned hulk.

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

Avoid gangster interaction while window-shopping.

Visit the monolithic tomb of America's most famous general.