This project created a facility that provided a stimulating arboreal-like environment for the our nearest biological relations and provides interpretation of their physiology intelligence and habitat. It consists of an elevated boardwalk, exhibit furniture to 7 exhibits and renovations to the interior of an existing 1970s Night quarters building including the industrial design pneumatic access doors from the Night quarters to the exhibit habitats. The project has been staged over 14 years due to available funds and is now complete. Sumatran Orang-utans are critically endangered and the Perth Zoo is regarded as a world leader in captive breeding of the Sumatran Orang-utan. Our cousins, the Orang-utans, are highly intelligent, tree dwelling great apes. They have the intelligence of a 6 year old child, and are very inquisitive, so creating a stimulating home for them is of critical importance. The climbing apparatus are in effect a “tuneable” artificial forest of branches, nests and vines that can be adapted to the needs of a growing Orang-utan. In an interview with ABC’s By-Design (3.12.2008) Perth Zoo, Dr. Jane Goodall, the world expert on Primates, said the exhibit was “absolutely wonderful-the best I've seen”.