Dictionary Johnson’s favorite feline.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

This donated headstone marks the grave of a pair of elderly women who were mysteriously murdered.

Once the largest gravity dam in the world.

Mary Rowlandson's kidnapping ordeal became one of the nation's first best-selling books.

The Burnside Fountain and its questionable interpretation.

A monument to the Mohawk people stands along an old Native American trade route.

A mysterious stone embedded at the base of a historic Boston building.

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

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

"Try not to knock anything over!"

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

A historic bridge no one is allowed to cross.

This American Sycamore was grown from seeds that accompanied the Apollo 14 mission in 1971.

This cave was once thought to be a hiding place for the devil.

A memorial sculpture to heath hens stands on the spot where the last heath hen, Booming Ben, was last seen.

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

These items are all that remain from the room used by the author during his second tour of the U.S.

You can get anything you want at the former site of the restaurant immortalized by Arlo Guthrie.

Martha's Vineyard's most beloved speakeasy sells late-night pastries.