The 27th Parallel is an imaginary line of latitude located 27 degrees north of the equator. It runs across various countries, including parts of Mexico, the United States, North Africa, and India. This parallel is significant in geography and climate studies, as it often marks the boundary between different climate zones. In the context of U.S. history, the 27th Parallel is notable for its association with the Mason-Dixon Line, which historically divided free and slave states. Additionally, it has cultural significance in literature and film, often representing a boundary between different worlds or experiences.