THE BLUE HOLE, CASTALIA, OHIO
Six miles west of Sandusky, Ohio, on Route 269.
The depth of the Blue Hole is unknown. The vis-
ible 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 vol-
ume of water flowing from this marvelous spring
is seven million gallons daily, sufficient to sup-
ply a city of 75,000 population.
Distributed by Rich-Holt Co. Sandusky, Ohio
24643
GARRISON COLOR CORP
DUMONTAN
