A town trapped in time - 1958 to be exact.

The highest natural point in New York City and all of the Atlantic coastal plain.

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

Yo, Adrian!

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

This elaborate towering structure was once famed for its revolutionary height.

One of the oldest of its kind.

This unusual subway stop was originally a real estate office.

I fought the law and the precinct caved in.

The only subway station in the city that still makes use of gap fillers.

Historical figures from New York City's Catholic community reside in Midtown.

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

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

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

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

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

New York City's only radical feminist independent bookstore.

The competition: breathe deeply as long as you can.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

A layered tribute to the work of mosaicist Isaiah Zagar.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.