This holiday season, visitors are invited to join in the many festive traditions going on throughout the Indiana State Museum and Historic Sites system, including the three historic sites in southwest Indiana: Angel Mounds, New Harmony and Vincennes. The holiday happenings begin at the Vincennes State Historic Sites. From 6:30-9:30 p.m. on Dec. 5, visitors can experience Indiana’s territorial capital all decked out for the holidays during the free Christmas Candlelight Tour. Costumed interpreters will guide guests around the buildings…