The Hudson River School comes alive at this palatial estate.

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

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

You must take the A train... to the last active cemetery in Manhattan.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A collaborative art project that transformed a neighborhood in NYC's Queens.

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

The remains of what was once the world's steepest passenger funicular.

Ruins of a once-prized railroad station in New York.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

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

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

Waterway populated with abandoned projects, including a submarine.

"A hideous albatross in the Hudson River Valley."

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

This once-private estate is now a dreamy, meditative garden that's open to the public.

Eclectic architecture in the woods of New York.

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

Little Red Lighthouse under the George Washington Bridge.

I fought the law and the precinct caved in.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

19th century cemetery hidden in Brooklyn's Prospect Park.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”