▁surface ▁dol ines ▁on ▁the ▁plate au ; ▁A ▁short ▁section ▁of ▁w alled ▁path way ▁d ug ▁into ▁the ▁floor ▁of ▁the ▁cave , ▁under ▁a ▁low ▁ce iling — the ▁" M oses ▁Walk " ▁is ▁so - called ▁because ▁the ▁river ▁continues ▁to ▁run ▁at ▁shoulder ▁level ▁either ▁side ▁of ▁the ▁path ; ▁A ▁visitor ▁centre , ▁car ▁park ▁and ▁access ▁road ▁on ▁the ▁surface . ▁ ▁Cover ing ▁a ▁small ▁section ▁of ▁the ▁system , ▁the ▁Mar ble ▁Arch ▁C aves ▁show ▁cave ▁was ▁opened ▁to ▁the ▁public ▁on ▁ 2 9 ▁May ▁ 1 9 8 5 . ▁Vis itors ▁travel ▁through ▁the ▁first ▁part ▁of ▁the ▁c aves ▁by ▁boat ▁on ▁the ▁sub ter rane an ▁Cl ad agh ▁River , ▁before ▁walking ▁through ▁the ▁rest ▁of ▁the ▁ch amb ers . ▁▁ ▁Between ▁ 1 9 8 5 ▁and ▁ 2 0 0 8 ▁the ▁show ▁cave ▁attract ed ▁approximately ▁ 1   mill ion ▁visitors , ▁from ▁ 1 0 0 ▁countries ▁world wide . ▁Ann ual ▁visitor ▁capacity ▁( d uring ▁the ▁period ▁that ▁the ▁cave ▁is ▁open , ▁March – Se ptember ) ▁is ▁ 9 4 , 0 6 0 . ▁ ▁European / Global ▁Ge op ark ▁status ▁▁ ▁In ▁ 2 0 0 1 , ▁the ▁c aves ▁and ▁the ▁nearby ▁Cu il c agh ▁Mountain ▁Park ▁joined ▁to ▁become ▁a ▁European ▁Ge op ark ▁under ▁the ▁name ▁Mar ble ▁Arch ▁C aves ▁European ▁Ge op ark , ▁the ▁first