▁of ▁the ▁ 9 ▁regions ▁of ▁Tr in idad ▁and ▁Tob ago . ▁It ▁is ▁the ▁most ▁popul ous ▁region ▁in ▁the ▁country ▁by ▁total ▁population ▁and ▁the ▁fifth - larg est ▁by ▁total ▁land ▁area . ▁Ge ograph ically ▁located ▁in ▁Northern ▁Tr in idad , ▁Tun ap una – P iar co ▁shares ▁its ▁borders ▁with ▁the ▁regions ▁of ▁San ▁Juan – L av ent ille ▁to ▁the ▁west , ▁Cou va – T aba qu ite – T al par o ▁to ▁the ▁south , ▁the ▁Bor ough ▁of ▁Ch agu anas ▁to ▁the ▁south - west , ▁Sang re ▁Grande ▁to ▁the ▁east ▁and ▁the ▁Car ib bean ▁Sea ▁to ▁the ▁north . ▁The ▁region ▁also ▁completely ▁surr ounds ▁the ▁Royal ▁Char tered ▁Bor ough ▁of ▁Ar ima , ▁which ▁is ▁located ▁in ▁the ▁south - e astern ▁corner ▁of ▁the ▁region . ▁ ▁Tun ap una – P iar co ▁is ▁one ▁of ▁the ▁most ▁ge ograph ically ▁diverse ▁regions ▁in ▁Tr in idad ▁and ▁Tob ago . ▁It ▁features ▁the ▁country ' s ▁two ▁highest ▁mountain ▁pe aks , ▁El ▁Cer ro ▁del ▁Ari po ▁at ▁ 3 , 0 8 4 ▁feet ▁and ▁El ▁T uc uche ▁standing ▁at ▁a ▁so aring ▁ 3 , 0 7 0 ▁feet , ▁which ▁both ▁tower ▁the ▁north ▁of ▁the ▁region ▁and ▁the ▁Northern ▁Coast ▁of ▁Tr in idad ▁forming ▁the ▁a ▁part ▁of ▁the ▁Northern ▁Range . ▁ ▁Geography ▁▁ ▁Tun ap una – P iar co ▁is