The Prison of Chillon is a historic castle located on the shores of Lake Geneva in Switzerland. It dates back to the 12th century and has served various purposes, including a fortress and a prison. The castle is known for its well-preserved architecture and stunning views of the surrounding landscape. Inside the prison, notable figures, such as François Bonivard, were held captive. Bonivard, a monk and political prisoner, inspired the famous poem "The Prisoner of Chillon" by Lord Byron. Today, the castle is a popular tourist attraction, offering guided tours and insights into its rich history.