There are many things that make Cellar Door special. First, it is one of the few remaining original dive bars in San Francisco. It has been around since the early 1900s and has survived Prohibition, the Great Depression, and numerous earthquakes. Second, it is known for its cheap drinks and friendly bartenders. Third, it has a unique atmosphere that can be best described as laid-back. Fourth, it is located in the heart of the Mission District, which is one of the most vibrant and culturally diverse neighborhoods in San Francisco. Finally, Cellar Door is special because it is a place where people from all walks of life can come together to have a good time.