Yes, both this and the Siamang exhibit have several mature trees. They have platforms installed in them (like the one Charlie’s sitting on), which I often see the orangutans resting on. Their favourite part of the exhibit is the high ropes though. They were closed to the orangutans at this point (to give the Siamang a turn), but as soon as they were open, the orangutans were up there like a shot.
A lovely little family the three of them (and a positive example of when an Orangutan female and male can entwine their lives together including the father being around for the babies upbringing, rather than the usual separation of territories and only coming together to breed).
@steveroberts Charlie and Melur are indeed a close pair. Charlie has been noted by keepers to be very placid for a male, which helps - but even then, females have their preferences. One of the previous females, Gangsa, adored Charlie; while Intan showed a clear preference for her father, Horst.