Fort Gaines, a town and the capital of Clay co., Georgia, on the Chattahoochee river, at the terminus of a branch of the Southwestern railroad, 155 m. S. by W. of Atlanta; pop. in 1870, 758. It is a shipping point for cotton. On Colamoka creek, a few miles S. E., are several ancient artificial mounds, the largest of which is 75 ft. high, with a level surface at the summit, 80 by 30 yards in extent. From the base a broad canal, 500 yards long and in some places 12 ft. deep, extends to the creek.