The national parklands in the national park system of the United States are among some of the most beautiful landscapes in the world. Between the mountain, desert, ocean, rainforest, and other terrains that make up these stunning parks, there is a wide variety of beauty that can be enjoyed by travelers who visit. While these national parks are breathtakingly beautiful year-round, many are even more beautiful during the colorful months of autumn when the leaves are changing color and mother nature has painted the landscapes with vibrant colors.