This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.

On the hills of Bay Ridge stands a house straight out of a fairy tale.

A working monastery hidden away in Brooklyn once abutted the location of a former inebriate's home.

The rare American Civil War-era weapon was never fired in anger.

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.

Avoid gangster interaction while window-shopping.

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

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

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

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

New York City's smallest piece of private property.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

A humble plaque marks the site where the country music legend was found dead in his Cadillac.

This ancient art form was used to capture the lives and struggles of the Haywood Street ministry.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

This elaborate towering structure was once famed for its revolutionary height.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.