From Albany Hilltowns
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Knox Cave - Robert P Addis: Figure 6 - Knox Cave sinkhole and entrance November, 1960
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|current||16:04, 1 October 2009||589×840 (132 KB)||JElberfeld||(Knox Cave - Robert P Addis: Figure 5 - Knox Cave sinkhole, January, 1959. The stairs have since been removed.)|