The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

Avoid gangster interaction while window-shopping.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

A dilapidated dock tells the story of Titanic's missed arrival.

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

Elevated freight railway turned wildly successful urban park.

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

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

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.

This translucent sculpture represents a quintessential component of New York City's skyline.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

Finally, you don't have to be a pious Swedish seaman to relax like one.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The longest step street in the city.

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

A building so large that it has its own weather.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A men’s restroom became a sandwich shop.

This landmark cemetery in Boston was created more than 300 years ago.

A centuries-old church stands as a testament to Boston's "father of architecture."