An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

Neoclassical bank designed by NY architects Helmle & Huberty.

Four cars from the old system were once on display, but were removed in 2014.

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

For almost a century, this East Village newsstand has served egg creams to beats, hippies, punks, and everything in between.

A graffiti Mecca welcoming artists from around the world.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

How a century-old glass factory in Queens became a concert venue and arts center.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

The only subway station in the city that still makes use of gap fillers.

An aptly-named street near the birthplace of the modern LGBT rights movement.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

The highest rapid transit station in the world.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

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

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

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

Love is in the air along the small street in Brooklyn.

The greatest real estate coup of all time.

The home of aviation trailblazers, in a remote corner of the big city.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.