The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

Located in a beautifully restored ice house, this museum is the result of decades of hard work and devotion to the craft of plumbing.

Once a kitschy symbol for a gift shop, this 38-foot seahorse is now a staple roadside attraction.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

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

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

The oldest living cultivated fruit tree in North America.

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

The ceiling of this vintage movie palace is covered in fantastic Art Deco murals.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

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

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

More than 200 unconventional musical instruments that anyone can play.

Civil War Fort on an island in the Boston Harbor.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

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

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.