Harvard Museums.  Harvard's museums have extensive collections and are free to anyone holding a valid Harvard ID card. Fees vary for others who visit the museums. Of particular interest are the Harvard University Art Museums (the Fogg Art Museum, and the Arthur M. Sackler Museum and the Busch-Reisinger Museum of Central and Northern European Art), and the Harvard University Museums of Natural History (including the Botanical Museum, the Museum of Comparative Zoology, the Mineralogical and Geological Museum, and the Peabody Museum of Archaeology and Ethnology). The Art Museums are free for those with Cambridge library cards. Other collections that may be visited include the Semitic Museum , the Collection of Historical Scientific Instruments, and the Arnold Arboretum. The Harvard Gazette lists special events and exhibits at Harvard each week. For more on Harvard Museums go to: http://www.harvard.edu/museums