Front:
27-Night View of the Famous Blue Hole, Castalia, Ohio
OB-H2516
In Ohio's Lake Erie Vacationland
Back:
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. 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.
E. B. ACKLEY, SANDUSKY, OHIO
