The Stone Door is a natural rock formation located in the Great Smoky Mountains National Park. It is known for its unique geological features, including a large, flat rock that resembles a door. The area is popular for hiking and offers scenic views of the surrounding landscape. Visitors to the Stone Door can access it via the Stone Door Trail, which is approximately 1.5 miles long. The trail is suitable for various skill levels and provides opportunities for wildlife observation and photography. The site is also part of the rich biodiversity found in the Great Smoky Mountains.