Claim: The Wonder Spot was  originally open by Louis Dauterman but later purchased by Bill Carney in 1988, and had as many as 50,000 visitors each year during the mid-1990's.
Evidence: Louis Dauterman of Fond du Lac, Wisconsin opened the Wonder Spot in 1952, and Bill Carney purchased it in 1988. According to Carney, as many as 50,000 visitors came to the site each year during the mid-1990s.