The Great Sand Dunes National Park is located in the United States, specifically in Colorado. This park is home to the tallest sand dunes in North America, reaching heights of over 700 feet (213 meters). The stunning landscape features a unique interplay of the dunes with nearby mountains, forests, and wetlands. The park provides opportunities for various outdoor activities, including hiking, sandboarding, and stargazing, attracting nature enthusiasts and adventure seekers alike.