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

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Slyly buy a shake in the Parker Meridien lobby.

From this desk Al Hirschfeld drew his influential caricatures of the 20th century's Broadway stars.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

This was one of the first (and last) university-built and operated nuclear reactors.

A Gothic-style abode built to accommodate the church's three resident peacocks.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

Peek through the gates at this oasis from the city, full of Old English charm.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

A playground the size of a city block is a modernist monument to civic values and public housing.

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

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

Unlock the secrets of the conjuring arts.

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

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

The former hotel where Tesla invented the radio.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

The first museum in the United States dedicated entirely to posters.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.