On February 11th, museums and historical places all over Georgia will participate in the annual Super Museum Sunday sponsored by The Georgia History Festival. Some of the locations already offer free admission, but the majority of them do not. Here is the information from their site –
The Georgia History Festival‘s Super Museum Sunday will be held on Sunday, February 11, 2018, at participating sites throughout Georgia.
Georgians and visitors alike experience our state’s rich history and cultural life as historic sites, house museums, art museums, and other points of interest in Savannah and throughout Georgia open their doors to the public, providing an exceptional opportunity to experience the history in our own backyard.
Free and open to the public. Sites offer free admission from 12:00 p.m. to 4:00 p.m. unless alternate hours are noted.
You can see a complete list of locations here. The closest location to Middle Georgia on the list is the Ocmulgee National Monument which is already free all the time; however, Jarrell Plantation is also listed, which normally charges admission. There are 94 other locations listed, so it might be a fun day for a road trip.