BTW, the jungle sets were nearby, not on that set. Many times they would use a few large outdoor nurseries that had tropical plants. Development in the area forced road trips! With the low-cost stuff, about as far as they would travel would be Vasquez Rocks (in the desert, about two hours, then) or south near the beach (rarely more than an hour’s travel).
It’s amazing what one sees when one lives in or near Los Angeles. When I was living in Reseda I was a house away from the Los Angeles River (which is naught but huge concrete ditches). For a week they filmed the Terminator 2 chases right in that stretch.