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.
Robinson's Hole
Robinson's Hole is the strait in Massachusetts' Elizabeth Islands separating Naushon Island from Pasque Island. It is one of four straits allowing maritime passage between Buzzards Bay and the Vineyard Sound. The others are Canapitsit Channel, Quick's Hole and Woods Hole.
Robinson's Hole is located in the town of Gosnold.