This general store has stood in the same spot for well over a century.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Time travel with sweets across history at this research-based candy store.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This elaborate towering structure was once famed for its revolutionary height.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Oldest synagogue in the United States.

The tennis legend used this racket while breaking the race barrier and becoming the first Black man to win the US Open.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

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

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

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

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

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

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

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

The 25th President's marble casket can be visited in this classical Ohio tomb.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

An office built to look like a giant basket.