An alley way dedicated to graffiti and street art is a constantly changing street gallery.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

A tiny monument to the classic American candy.

The world's largest piece of copyrighted artwork.

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

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Radical Bookstore and Community Space.

The oldest playground in America.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

The hill that gave the Massachusett tribe, and later the state, its name.

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

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

Dedicated to one of the darkest moments in Irish history.

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

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

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

These whimsical works of art tell the story of the city's past and present.

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

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

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

Statue commemorating the use of ether in anesthesia.

This research center for rare prosimians is studying how they sleep to help prolong human life.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.