According to the Sandusky History website, Helen Keller addressed the national convention of the Lions Club at Cedar Point on June 30, 1925. Miss Keller was known for her social activism and public speaking skills, and for having overcome the challenges of being both deaf and blind. The plaque marks the spot where Miss Keller spoke at the Cedar Point resort in 1925. Read more about the amazing Helen Keller at the website of the American Foundation for the Blind. Helen Keller died on June 1, 1968, and she was buried at the Washington National Cathedral.