This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

The Burnside Fountain and its questionable interpretation.

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

This historic cemetery is filled with markers that look more like candy than was likely intended.

More than 200 unconventional musical instruments that anyone can play.

Resonating tubes make music from highway overpass.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

A historic pub with traditional Irish cuisine, fine drinks, and a paranormal past.

One of the largest public collection of historic armored and military vehicles in North America.

The gravestone of the man who designed the plastic pink flamingo is adorned with his most famous creation.

Eliot was the first missionary to produce religious text for Algonquians in their own language.

These impressively detailed battle scenes depict the violence and tragedy of war in miniature.

A historic bridge with a lovely acoustic anomaly.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

The final resting place of the first documented Chinese person in the United States lies in a Boston cemetery.

Malcolm X's house during his most formative years faces an uncertain future.

America’s oldest community theater, this Boston club has been in operation since 1877.

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

The last remaining 19th-century tenement from Boston's old West End neighborhood.