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Entrance to Blue Hole. The Blue Hole is a fresh water pond and cenote 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 7 miles (11 km) southwest of the Cedar Point amusement park in Sandusky, Ohio.
English: Description on card: The Famous Blue Hole, Castalia, Ohio Description on back of card: THE BLUE HOLE, CASTALIA, OHIO. Six miles west of Sandusky, Ohio, on Route 101. The depth of the Blue Hole is unknown. The visible depth is apparently 50 or 60 feet.
The most interesting section is the blue hole, which is the cause of the Lost River being listed by Ripley's Believe it or Not as the "Shortest, deepest river in the world." Plumb bobs indicated that the blue hole was 437 feet deep, while the river itself is only 400 feet long. The blue hole is though in fact linked to a further underground river.
Known as Dean’s Blue Hole, this geological wonder located off the coast of Long Island is a staggering 663 feet deep, making it one of the deepest blue holes in the world and also an area ripe ...
The Great Blue Hole, located near Ambergris Caye, Belize Dean's Blue Hole, Long Island, Bahamas Watling's Blue Hole, San Salvador Island, Bahamas. A blue hole is a large marine cavern or sinkhole, which is open to the surface and has developed in a bank or island composed of a carbonate bedrock (limestone or coral reef).
This subterranean formation could potentially even offer a portal to both space and time like a subaquatic black hole. In 2012, scientists exploring blue holes in the Bahamas discovered bacteria ...
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The Great Blue Hole, a giant submarine sinkhole, near Ambergris Caye, Belize. The following is a list of sinkholes, blue holes, dolines, crown holes, cenotes, and pit caves. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.