These beautiful garden buildings are among the oldest surviving greenhouses in the United States.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

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

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

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

This small shop walked so America could run on Dunkin'.

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