My wife and I felt that Belvedere Lookout justified our car rental by itself and it's without a doubt a must see for anyone visiting Moorea. From the top of the lookout you get an amazing view of both bays. There are old ruins that you can tour and a vendor that will sell you ice cream or drinks while you lookout over the entire island. Don't waste your time with a tour operator. Rent a car (not a buggy, they are a disaster!!) and drive yourself to the top. That way you can stay as long as you like!