A Natural History and Science Emporium.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

A small part of lower Manhattan is actually made from a bit of England.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

Red frames showcase remnants of one of New York's original subway stations.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

Set sail on a small scale.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

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

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Play heads or tails with thousands of different coins.

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

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

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

A prohibition era watering hole for the police.