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1915 boat trip on the Echo river, Mammoth Cave Kentucky -- 36 ft. underground. National Park Service Historic Photograph by M. D. Bullock.

Original Print - "Copyrighted 1915/M. D. Bullock/ Royal Photo Co./ Louisville, Ky.

Related Links & Resources:
● Kentucky National Parks
● A Guide to Public Hunting Areas in Kentucky
● Interactive Kentucky Hunting and Fishing Maps
● Kentucky Wildlife Management Areas
● Kentucky National Forests
● Kentucky State Parks

Mammoth Cave Books