A 13,000-year-old mastodon skeleton was found during the construction of a 19th-century New York mill.

This historic church with a connection to "Uncle Sam" is now a fraternity house.

This stained glass window designed by Tiffany Studios is hidden behind the circulation desk of a public library.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A CT scan revealed the identity of this 3,000-year-old mummy that everyone erroneously thought was female.

"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."

The hill that gave the Massachusett tribe, and later the state, its name.

Site of an oft forgotten and revolutionary battle.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

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

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

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

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

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

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

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

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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