A small plaque promises cold, hard cash in exchange for work by the famous pop artist.

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

This unassuming stone commemorates a condiment factory gone up in smoke.

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

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This supermarket is suspended 25 feet above an interstate highway.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

On a side street near the interstate is the building where the famous anarchist once owned an ice cream parlor.

The Burnside Fountain and its questionable interpretation.

A grave surprise in the downtown area of New England's second-largest city.

This cemetery is home to numerous granite headstones that are works of art unto themselves.

A home decorated by its owner with eye-catching and captivating assemblages of found objects

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

The world's largest piece of copyrighted artwork.

This beautiful architectural gem was the first waste treatment facility in Boston.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

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

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

Civil War Fort on an island in the Boston Harbor.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

The last remaining attraction from Paragon Park.

One of the earliest graveyards in the region.