The Gearagh is a national nature reserve on an inland delta, is located south of Macroom. It comprises a series of small islands, separated by anastomosing, mostly flat, river channels or streams, and is bounded by Toon Bridge, Illaunmore, and Anahala Bridge. The area is thought to have been wooded since the end of the last Ice Age c. 8,000 bc. The alluvial woodland extended as far as the Lee Bridge, and consisted of a large number of mature oak and ash trees.