Centurion Dogging

So the wife and I recently had sex in our car, mind you it was in our own drive way... I mentioned that it would be fun being watched and she agreed and likes the idea a lot. All that is left is finding a location where this can be done. We are in Centurion and would prefer it if we can keep in here. Does anybody know of decent locations where this can take place. Must be safe and secluded...