Caves]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1945]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1944]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1943]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1942]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1941]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1940]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1939]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1938]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1937]]> Mammoth Cave National Park (Ky.)]]> Great Onyx Cave]]> Caves]]> Unknown]]> American Alpine Club Photo Collection]]> .jpg]]> Kentucky, 1900 to 1936]]>