No. 110 is a standard gauge 2-6-2 built in 1927 by Vulcan Iron Works of Wilkes-Barre, PA. It operated on the Stone Mountain Scenic Railroad as the Yonah II but was taken out of service and put on display at the west end of the park's train boarding area.
Note: In 2013, this engine was moved to the New Hope Valley Railway in Bonsal, North Carolina.
For historical information on the park's locomotives, see Stone Mountain Scenic Railroad at Wikipedia.