The people in this story were real. What happened to them is the part under argument.
The Bell Witch is a legend of Southern United States folklore centred on the 19th-century Bell family of northwest Robertson County, Tennessee. The farmer John Bell Sr. lived with his family along the Red River, in an area near what is now the town of Adams. According to the legend, from 1817 to 1821 the family and the surrounding area came under attack by a mostly invisible entity that could speak, affect the physical world and change shape. Some accounts add that it was clairvoyant and could cross long distances at superhuman speed, or be in more than one place at once.
The reason the story has the shape it does is a single book. In 1894 the newspaper editor Martin V. Ingram published his Authenticated History of the Bell Witch, widely regarded as the first full-length record of the legend and the primary source for everything written since. The people named in it were real historical figures.
What modern researchers make of Ingram divides sharply. Some sceptics regard his work as historical fiction, or as fraud. Others treat it as an early piece of folklore scholarship.
The Bell Witch Site, a long-running research project by Pat Fitzhugh, keeps the two strands apart in the same way: it publishes the legend as told, then separately documents the real people, the early accounts, essays on key topics and the Bell family genealogy, alongside the history of Adams, Tennessee itself.
Read the real people first. Note also that much of the surrounding ground is private property.
Other places on the map within a couple of hours.