Heat-treated pine and steel were used to create this unique treehouse inside the Garvan Woodland Gardens in central Arkansas. The space, a 210-acre nature park with botanical gardens owned by the University of Arkansas, borders the Quachita River. The structure itself resides inside a children’s garden full of native trees such as oak and pine, and serves as an interactive experience for children. The treatment process to create the “thermalised” southern yellow pine uses heat and steam to ensure longer-lasting durability of the wood.