Nantucket Historical Association
This association maintains an assortment of venerable properties in town. A $25 pass gets you into all of the association's sites, including the glorious Whaling Museum and Hadwen House: historic properties including the Oldest House, Old Mill, Old Gaol, Greater Light are free for all visitors. Reserve in advance for the 60-minute Historic Downtown walking tour ( $25), which departs Monday through Saturday, late May–early September.