▁numerous ▁artifact s ▁inside ▁the ▁entrance . ▁ ▁During ▁a ▁research ▁trip ▁into ▁the ▁cave ▁on ▁January ▁ 1 5 , ▁ 2 0 0 5 , ▁Park ▁R anger ▁Amy ▁Wal lace , ▁History ▁professor ▁Joe ▁Douglas , ▁local ▁historian ▁Billy f rank ▁Mor r ison , ▁and ▁Ge ologist ▁Larry ▁E . ▁Matt he ws , ▁discovered ▁Indian ▁g lyph s ▁on ▁the ▁walls ▁of ▁the ▁cave . ▁ ▁Sub sequ ent ▁investig ations ▁by ▁arch ae olog ists ▁from ▁the ▁University ▁of ▁Tennessee ▁at ▁Kno x ville ▁confirmed ▁that ▁these ▁draw ings ▁were ▁left ▁by ▁people ▁of ▁the ▁Mississ ipp ian ▁culture , ▁which ▁was ▁active ▁about ▁ 1 0 0 0 - 1 3 0 0 ▁CE . ▁These ▁Indian ▁g lyph s ▁were ▁featured ▁for ▁a ▁few ▁years ▁on ▁the ▁tour ▁of ▁the ▁cave . ▁ ▁In ▁ 2 0 0 9 , ▁the ▁State ▁of ▁Tennessee ▁closed ▁Dun bar ▁C ave ▁to ▁the ▁public ▁for ▁several ▁years ▁because ▁White ▁N ose ▁Sy nd rome ▁was ▁diagn osed ▁in ▁a ▁bat ▁and ▁they ▁did ▁not ▁want ▁the ▁disease ▁to ▁spread . ▁The ▁cave ▁has ▁since ▁re open ed ▁and ▁t ours ▁are ▁conducted ▁season ally , ▁from ▁May ▁to ▁August . ▁ ▁Ad j acent ▁count ies ▁Christian ▁County , ▁Kentucky ▁( n orth ) ▁Tod d ▁County , ▁Kentucky ▁( n ortheast ) ▁Robert son ▁County ▁( east ) ▁Che ath am ▁County ▁( s out heast ) ▁Dick son ▁County ▁( s outh ) ▁Houston ▁County