I second Stone Mountain. Also Kennesaw Mountain N. of Atlanta, and the shores of lake Alatoona.

South of Atlanta there's the Atlanta Motor Speedway, though that's better when there's actually a race there than when it's empty, and might be difficult during a race to shoot LF (hey, it's urban landscape right? )

If you're willing to drive about an hour north, there's Chattanooga with Lookout Mountain and a railroad museum and lots of other stuff too.