I got this information on their Facebook page.:
FREE ADMISSION to Callaway Gardens on Saturday, November 6, 2010. Admission will be waived for guests to enjoy the Gardens in honor and memory of Cason J. Callaway, founder of Callaway Gardens. An organ concert will take place at the Ida Cason Callaway Memorial Chapel from 2 p.m. to 4 p.m. Come and learn what Callaway Gardens is all about!
(Thanks, Mommy Octopus)