If you don't already know it, you should have a look at the following site.
You will find there some very useful information regarding the national parks
Marcin Wielicki a *crit :
> I will be visiting this winter Singapore and Eastern Malaysia (Sarawak and
> Sabah provinces of Borneo) and I seek for recommendtions and informations
> on nurseries/collection/parks/gardens to visit. I know only Malesiana in
> Kuching. Will be very grateful for any help.
> Marcin Wielicki
3, rue de Labroque