I would suggest looking up words such as: captivating, enchanting, breathtaking (at one extreme) and sweet, pretty, adorable (at the other). Each has its own nuances. But "it's so beautiful" can't be boring if it's said with passion. :)

Nature provides us with the necessary conditions for life. It is always for us to pay silently, let us live a happy life. But what we have to return it, no! The nature is beautiful. It has clear water, fresh air, lush forests, rare wild animal, and so on. However, this phenomenon has become less and less. Because people continue to cut down trees, to catch wild animal, continuous discharge of sewage into the river, continuous emissions to the sky, this kind of behavior, has made the river past the dark, the sky was black, the wild animal has been scanty.