Brick Mill Falls is a scenic, two-tiered 20-foot waterfall located on Scott Mill Creek just outside the Canton city limits. Brick Mill Road passes right by the falls at 1.2 miles from Hwy 140, and there is a partial roadside view through the trees. Unfortunately, the falls are on private property, and the path to the base is off limits to the public. I'm sure the ample spray paint on the rocks is no small reason for the waterfall's closure. Just remember you can't leave the road, which is lined by numerous No Parking signs. 

To learn about more waterfalls in the Atlanta metro area, see chapter 11 in Mark Ozboyd's "Waterfalls of Georgia" guidebook.