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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

"Mock all and sundry things, but leave the saints alone."

This landmark cemetery in Boston was created more than 300 years ago.

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

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

Narrowest house in Boston.

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

Radical Bookstore and Community Space.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

This impressive Boston holy house is the American mecca for Christian scientists.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Historic Hull Street was actually the first street with a proper name in the Boston area.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

This picturesque abandoned home is rumored to be a spite house.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The Underground Railroad passed right through this historic Brooklyn Heights church.