The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Toxic waste disaster that founded the Superfund program.

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

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

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

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

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

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

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

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

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

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

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

Plot your trip through the city on the sidewalk.

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

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

A natural gas leak provides a flickering flame beneath a waterfall.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A celebration of capitalism in Midtown.

New York City's smallest piece of private property.