Dedicated to the neverending mathematical constant, this plaque next to a park bench was sponsored by an anonymous benefactor.

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

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

Dedicated to a colonial woman who was hanged for being a Quaker.

Designed to honor all those that work as nurses around the globe.

A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

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

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

A stone marker commemorating the first time sound was transmitted over wires.

The Boston home of a conductor on the Underground Railroad.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

This electronics repair store celebrates the history of computers.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

A memorial to Chinese freedom in the city where American freedom was born.

What may be Boston's finest Art Deco building, located in the city's Financial District.

A luxury hotel constructed out of a former jail.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

In the 19th century, this was the center of Boston's Black community.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

This historic Boston building has gone from personal estate to porn theater and back again.

A disastrous shipwreck and a tragic love story.

The world's largest piece of copyrighted artwork.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.