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.
Woods Hole (passage)
Woods Hole is a strait in Massachusetts separating the Elizabeth Islands from the village of Woods Hole on the mainland of Cape Cod. It is one of four straits allowing maritime passage between Buzzards Bay and Vineyard Sound. The others are Canapitsit Channel, Robinson's Hole and Quick's Hole. Woods Hole is often referred to as Woods Hole Passage to distinguish it from the village of Woods Hole, which is itself named after the passage.