: E du c ational ▁institutions ▁established ▁in ▁ 1 9 5 6 ▁Category : 1 9 5 6 ▁establish ments ▁in ▁Pakistan ▁Category : Sch ools ▁in ▁Ch itt ag ong ▁District <0x0A> </s> ▁The ▁Mar ble ▁Arch ▁C aves ▁are ▁a ▁series ▁of ▁natural ▁lim estone ▁c aves ▁located ▁near ▁the ▁village ▁of ▁Florence court ▁in ▁County ▁F erman agh , ▁Northern ▁Ireland . ▁The ▁c aves ▁are ▁named ▁after ▁the ▁nearby ▁Mar ble ▁Arch , ▁a ▁natural ▁lim estone ▁arch ▁at ▁the ▁up stream ▁end ▁of ▁Cl ad agh ▁Glen ▁under ▁which ▁the ▁Cl ad agh ▁River ▁flows . ▁The ▁c aves ▁are ▁formed ▁from ▁three ▁rivers ▁dra ining ▁off ▁the ▁northern ▁s lop es ▁of ▁Cu il c agh ▁mountain , ▁which ▁combine ▁under ground ▁to ▁form ▁the ▁Cl ad agh . ▁On ▁the ▁surface , ▁the ▁river ▁emer ges ▁from ▁the ▁largest ▁kar st ▁res urg ence ▁in ▁Ireland , ▁and ▁one ▁of ▁the ▁largest ▁in ▁the ▁United ▁Kingdom . ▁At ▁ ▁the ▁Mar ble ▁Arch ▁C aves ▁form ▁the ▁longest ▁known ▁cave ▁system ▁in ▁Northern ▁Ireland , ▁and ▁the ▁kar st ▁is ▁considered ▁to ▁be ▁among ▁the ▁fin est ▁in ▁the ▁British ▁Is les . ▁ ▁History ▁▁ 1 8 th – 1 9 th ▁century : ▁The ▁J unction , ▁Grand ▁Gallery ▁and ▁Pool ▁Chamber ▁ ▁The ▁Mar ble ▁Arch , ▁Cl ad agh ▁River ▁res urg ence ▁and ▁three ▁large ▁dol ines ▁on ▁the ▁plate au ▁above ▁the ▁end ▁of ▁Cl ad agh ▁Glen ▁were