Pudong actually has some nice outdoor pools. The ticket price for this is really good for what you're getting: a giant pool and an atmosphere reminiscent of a resort in Thailand or something. There's also a really good coffee shop at the poolside. If you're looking for a great place to relax and soak up some sunshine, this is the spot for you. Remember to bring your own towel, and there's a convenient bar where you can purchase drinks and food too.