The most decorated dog of World War I is preserved in the Smithsonian.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

A computer bug so primitive it was an actual insect.

The house where John Wilkes Booth conspired with his co-conspirators.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A public art jibe at one of the United States’ oldest and longest-serving senators.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

A dollhouse full of taxidermy rodents, each one handcrafted and given a sordid past.

The headquarters in Salem doubles as an occult art gallery.

A museum dedicated exclusively to the lore and history of ouija boards.

A collection of full-size movie monsters opened to the public.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

This small shop walked so America could run on Dunkin'.

One man is on a singular quest to name an island after a famous hip-hop artist.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.