Diamond Tree

The Diamond Tree is a 51-metre karri (Eucalyptus diversicolor) fire lookout tree located about 10 kilometres south of Manjimup in Western Australia's Southern Forests. Built in 1939 with a timber cabin at its crown and accessed by metal spikes, it is one of three historic climbable lookout trees in the region. Surrounded by karri forest within State Forest, it offers forest views and illustrates Western Australia's forestry and fire surveillance heritage.

Visitors can expect a towering karri tree set in open karri forest with a small wooden lookout cabin near the top, reached historically by climbing metal spikes embedded in the trunk. The site includes a cleared base, car park and picnic area surrounded by tall forest. Visitors can view the tree from ground level, photograph the structure, read interpretive signage about forestry and fire lookout history, and enjoy short walks and forest scenery. Climbing to the cabin has been closed to the public for safety reasons.

Constructed in 1939 as a fire lookout, the Diamond Tree is one of a network of karri trees fitted with cabins and climbing spikes for fire detection across the Southern Forests. Used by foresters to spot bushfires, it operated as an active lookout until the early 1970s and represents the era of manual fire surveillance before aerial detection. It is one of three remaining climbable lookout trees alongside the Gloucester Tree and Bicentennial Tree.

The tree is a significant example of Western Australia's forestry heritage and karri forest culture, illustrating the history of timber industry and bushfire management in the Manjimup region. It is a well-known visitor landmark for the Southern Forests and symbolizes the relationship between the community and the tall karri forests.