Lyon Arboretum located on terrain feature Oahu
The Harold L. Lyon Arboretum is a 200-acre (0.8 km2) arboretum and botanical garden managed by the University of Hawaiʻi at Mānoa located at the upper end of Mānoa Valley in Hawaiʻi.
Much of the Arboretum's botanical collection consists of an artificial lowland tropical rainforest with numerous trails and small water features.