A curious friendship between two inanimate ladies.

A staggering collection of photographs depicting medical, social, and historical change.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

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

A whimsical, but often overlooked clock in Park Avenue.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

New York City's only preserved family home from the 19th century.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

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

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Plot your trip through the city on the sidewalk.

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

The oldest living tree in Manhattan comes shrouded in sinister legend.

An artist's cute bronze subway sculptures belie his violent artistic past.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Wine bottle sculpture with a ship's stateroom inside.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

New York's oldest and possibly grandest keeper of books.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

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