The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The Boston square dedicated to the dark poet who was born nearby.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

An accidentally hidden library containing the ephemeral history of New York.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Tucked in the back of this amazing antique store is an important piece of medical history.

The best place in New York to pick up the controversial, notoriously foul-smelling Asian "king of fruits."

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

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

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

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

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

You must take the A train... to the last active cemetery in Manhattan.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.