I haven't been to many places in the world but i have travelled alot around China and I must say, 三亚 is the most beautiful place I have seen (with my own eyes). But, saying that, 黄山 is also very beautiful, these two places cannot really be compared as they are two completely different types of beauty.
I think I have seen those ads about NZ too,they do make it look amazing, don't they? But then, you could do the same for Scottland....I would need to see it for myself to believe.