The Great Smoky Mountains are a mountain range located on the border between North Carolina and Tennessee in the United States. They are part of the Appalachian Mountains and are known for their rich biodiversity, with over 19,000 documented species of living organisms. The area is also famous for its misty blue haze, which is caused by the vegetation releasing moisture into the air. The Great Smoky Mountains National Park, established in 1934, is the most visited national park in the United States. It covers over 800 square miles and offers a variety of recreational activities, including hiking, camping, and wildlife viewing. The park is home to historic sites, such as old homesteads and churches, reflecting the cultural heritage of the region.