Blue Hole (Castalia)
The Blue Hole is a fresh water pond located in Castalia, Erie County, Ohio, in the United States. From the 1920s to 1990 the Blue Hole was a tourist site, attracting 165,000 visitors annually at the height of its popularity, partly because of its location on State Route 269, about southwest of the Cedar Point amusement park in Sandusky, Ohio.
Stephanie Schwabe
Schwabe is the founder and director of the Rob Palmer Blues Holes Foundation, a nonprofit organization. The foundation is dedicated to the scientific and physical exploration of blue holes within the Bahamas and related environment. The foundation's goals are to encourage education and conservation of Bahamian caves and blue holes.