Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

Once the largest gravity dam in the world.

Commemorating the 1948 creation of the Jimmy Fund, a Boston-based cancer charity.

The former home of the oldest nail maker in the United States was built on the ashes of a mill burned by the British.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

Eliot was the first missionary to produce religious text for Algonquians in their own language.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This museum shines a light on the true Pilgrim experience in North America.

Hundreds of personalized inscribed planks make up this historic boardwalk.

These impressively detailed battle scenes depict the violence and tragedy of war in miniature.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

This supermarket is suspended 25 feet above an interstate highway.

The world's largest piece of copyrighted artwork.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

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

This candy-colored storybook village originated as a 19th-century Methodist campground.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.