The Mount Desert Island Historical Society seeks to preserve and share the history of Mount Desert Island, ME from 1761 to present. To this end, the society operates the 1892 Old School House and Museum, the Farm Stand at the Old School House, the Somesville Historical Museum and Gardens, and the Selectman's Building and Bridge. The Farm Stand presents transportation, craft, and agricultural artifacts. The Somesville Historical Museum grounds contain an heirloom garden. The Selectman's Building, erected in the 1780s, now houses displays on cobbling.

The society offers exhibits, period rooms, gardens, an 1894 school day program for third and fourth grade students, and children's activities. Guests wishing to see the Old School House and Museum in June should call ahead to verify that the site will be open when they plan to visit. The Selectman's Building is open July through September.