Audience: General; Subject: Social Studies.(2015) Hidden in the back of Manoa Valley, the Lyon Arboretum is a historic site that serves as a botanical garden, an educational institution, and a research facility. The documentary tells the history of the arboretum and the vital role it played in preserving our watershed. The many present-day activities of the arboretum are also featured including its work in preserving and exhibiting Native Hawaiian and exotic plants, its role as an educational institution and its role as a research facility.