Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

The Boston square dedicated to the dark poet who was born nearby.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

The world's largest piece of copyrighted artwork.

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

Bouncing, delightful, mechanical art at the MIT Museum.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

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

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

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

The bears may be gone, but their old cages can still be found.

Radical Bookstore and Community Space.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

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

An enormous, inside-out glass globe built in 1935.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

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

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

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

Narrowest house in Boston.

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

One of the indelible moments of the American Revolution took place at this location.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.