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

This unassuming stone commemorates a condiment factory gone up in smoke.

This hidden labyrinth offers walkers some brief peace of mind.

This beautiful architectural gem was the first waste treatment facility in Boston.

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

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

A unique columnar residence built in the 19th century.

This railroad tunnel was once the longest in Massachusetts.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

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

The bears may be gone, but their old cages can still be found.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

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

A historic bridge with a lovely acoustic anomaly.

A beautiful Victorian-era cemetery, complete with a miniature village.

Dim sum, served in a grand old theater.