Tucked into Pittsburgh’s North Side, the Mattress Factory is a labyrinth of permanent, room-sized installations where artists transform entire spaces into mind-bending, immersive worlds.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The colonial home of Paul Revere during the American Revolution.

A plaque marking the famous abolitionist's birthplace often overlooked by visitors to the nearby Charles Sumner House.

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

Former home of an abolitionist couple who escaped slavery and established the most active Underground Railroad stop in Boston.

Historic home of a Black veteran of the American Revolution and one of the earliest civil rights activists in the United States.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This mosaic commemorates the oldest subway tunnel and station in the United States.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

This historic house was the birthplace and childhood home of the 35th president of the United States.

A giant sculpture head with an optical illusion dedicated to the longtime conductor of the Boston Pops.

A pair of antique trolleys are on display at one of the oldest subway stations in the United States.

The bench featured in the film with Robin Williams and Matt Damon has become a popular destination for moviegoers.

This historic sculpture from the 16th century is even older than the city of Boston.

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

A unique music museum housed in a historic Boston theater.

This marble tower commemorates the first victory of George Washington and a major turning point in the American Revolution

This plaque is dedicated to a historic hotel’s Canine Ambassador and the subject of two children’s books.

This sculpture dedicated to a pioneering labor unionist and civil rights activist is located inside a busy Boston train station.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

Commemorating the 1948 creation of the Jimmy Fund, a Boston-based cancer charity.