This collection is the largest in the world dedicated to Sherlock Holmes and Sir Arthur Conan Doyle.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

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

The last remaining attraction from Paragon Park.

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

One of the indelible moments of the American Revolution took place at this location.

Dedicated to a colonial woman who was hanged for being a Quaker.

A luxury hotel constructed out of a former jail.

This impressive Boston holy house is the American mecca for Christian scientists.

Dedicated to one of the darkest moments in Irish history.

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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

This landmark cemetery in Boston was created more than 300 years ago.

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

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

The Boston square dedicated to the dark poet who was born nearby.

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.

The world's largest piece of copyrighted artwork.