One kilometer of thick brass rod laid out before your eyes.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Try not to get slimed in Tribeca.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

A Manhattan office building is home to the world's largest chess board.

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

Hiroshima survivor on Riverside Drive.

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

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

The Hudson River School comes alive at this palatial estate.