This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

This plaque commemorates the call between Alexander Graham Bell and Thomas A. Watson.

This plaque is dedicated to one-half of the Magliozzi brothers and their hit radio show, 'Car Talk.'

This is the house that spite built.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

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

The massive machine creates cracking displays of indoor lightning.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

One of America's most historic homes also holds a startling literary legacy.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

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

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This hidden labyrinth offers walkers some brief peace of mind.

A tiny monument to the classic American candy.

Bouncing, delightful, mechanical art at the MIT Museum.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Impossibly life-like natural history models created out of glass by a father and son.