8-21-60
THE FAMOUS BLUE HOLE
CASTALIA, OHIO
Six miles west of Sandusky, Ohio, on
Route 101. The depth of the Blue Hole is un-
known. The visible depth is apparently 50
or 60 feet. It finds its source in an under-
ground river and maintains a temperature of
48 degrees, winter and summer. It is not
affected by floods or drought. The volume of
water flowing from this marvelous spring is
seven million gallons daily, sufficient to
supply a city of 75,000 population.
30.K821
DISTRIBUTED BY RICH HOLT CO., SANDUSKY, OHIO
-"CURTEICHCOLOR" REPRODUCTION FROM KODACHROME OR EKTACHROME ORIGINAL-
11/19/78
