The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Second largest wastewater treatment plant in the country.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

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

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

The infamous Boston Mob ran rackets from an office here in the 1970s.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

Dedicated to one of the darkest moments in Irish history.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.