General View of Blue Hole - Castalia, Ohio - Vintage Postcard

On front: General View of Blue Hole, Castalia, Ohio.
On back: Castalia Blue Hole. Discovered by Robert Rogers, 1760. The most interesting sight in the Fire Lands today. Depth unknown. Visible depth, 45 ft. Source underground river. The temperature 48 degrees winter and summer. It never freezes and is not affected by floods or drought. Discharges 5,000 gallons of water every minute. Fish cannot live in Blue Hole, as it is absolutely free from air or food. Years ago, it was known as an Indian Medicine Camp; today, it supplies water for a fine brook trout fishing club. 
Unmailed:
Condition: Good with some aging around the edges and stains on the upper part of the card 
Publisher: R. J. Woolson 
Color 

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