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ENTRANCE TO BLUE HOLE
Castalia, Ohio
Six miles west of Sandusky, Ohio, on Route 269.
The depth of the Blue Hole is unknown. The
visible depth is apparently 50 or 60 feet. It finds
its source in an underground 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.
Distributed by the Rich-Holt Co., Sandusky, Ohio
by COLOURPICTURE
BOSTON, MASS. 02130
P66569
MADE IN U.S.A.
