The New Hampshire Historical Society is home to all kinds of photos, objects and books that make up the history of the Granite State. And understandably, the society likes to show it off. The Discovering N.H. exhibit opened in early November and will be on display at the Park Street headquarters for at least two years. From Nancy Sununu’s inaugural gown and jacket to a real live snowmobile, this surely touches upon all aspects of N.H.’s past.