In the United States, there are 63 National Parks with breathtaking natural beauty and terrain. Every year, these national parks receive millions of visitors throughout the year. However, some of the most beautiful and visited national parks are Yellowstone National Park in Wyoming, Olympic National Forest in Washington, Denali National Park in Alaska, Great Sand Dunes National Park in Colorado, Yosemite National Park in California, Grand Canyon National Park in Arizona, Canyonlands National Park in Utah, Rocky Mountain National Park in Colorado, etc.