The 28-foot granite map plots the locations of 40 theaters in New York City.

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

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

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

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A living archive of urban activism and space reclaimed.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Unique antiquarian shop specializing in globes, maps, and prints.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Nikola Tesla's former home contains an homage hidden from plain sight.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Read a book next to a Midtown waterfall.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Elevated freight railway turned wildly successful urban park.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Try not to get slimed in Tribeca.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.