I don't know much about the Augusta area re: haunts, but 2 of the best haunts in the country are north of ATL in Norcross, both occupy the same warehouse. You will find it under the name "Netherworld."
Down near Ft. Benning, you can come to Pope's Haunted Farm. They have a hayride, a haunted house or two and a haunted maze. It's pretty fun.
Have you been to
www.googhoul.com?