Alliance Falls is the lower in a pair of large waterfalls found in the headwaters of Thomas Creek on the western slopes of Rabun Bald. It's located on the same stream as Big Thomas Creek Falls, which lies much farther downstream near the Darnell Creek confluence. About 30 feet high, this is a scenic vertical waterfall dropping in a single tier. It's best seen in wet weather due to the small watershed size. 

Reaching Alliance Falls requires a long, tough bushwhack. An old logging road along the north side of Thomas Creek leads to a point just below the falls, but it's very overgrown and is little better than no trail at all. I have also heard there may be an alternate route into this valley from Sky Valley and the Flint Knob area to the north. 

For detailed directions, see page 349 in Mark Ozboyd's "Waterfalls of Georgia" guidebook.