Drive by the century old Phelps Grove Park in the heart of Springfield, Missouri, and many say you can see the ghost of a woman, in what appears to be a wedding gown, standing beneath a stone bridge. Some say she died there, on her wedding day. But there's no record of such a tragedy occurring at the park. In this episode, we look at where this legend may come from, and how science explains why we see strange things to begin with.