A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

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

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

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

Narrowest house in Boston.

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

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

A school used as a model for public education across the country.

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

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

This historic patch of real estate offers a glimpse of colonial Boston.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

A men’s restroom became a sandwich shop.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.