These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

Largest Roman Catholic church in North America.

When it opened during the final years of the embargo, all the drinks and cigars were free.

An Industrial Revolution-era public work that purified water using nothing but sand.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A terrific purveyor of natural history objects and curios.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

A decorated war pigeon stands guard in eternal taxidermied rest at his alma mater.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

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

No one messes with the Massachusetts sacred cod, not this time...

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

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

A unique sculpture park that specializes in the huge and bizarre.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

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

This ambitious father and son team reigned supreme over the North End, and witches, for many years.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

Radical Bookstore and Community Space.