Front:
The Blue Hole, Castalia. Ohio
Back:
DISTRIBUTED BY RICH-HOLT CO., SANDUSKY, OHIO
THE 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 tempera-
ture 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.
CURTEICH COLOR 3-D NATURAL COLOR REPRODUCTIONS (REG.U.S.A.PAT. OFF.)
Panoramic
D-13488
(LETTER POSTAGE)
