Tavoliere delle Puglie
3 , 000 km² , once constituting a sea bottom: it is bounded by the Daunian Pre-Apennines on the West , the Gargano Promontory and the Adriatic Sea on the East , by the Fortore river on the north , and the Ofanto river on the south . 
<triplet> Adriatic Sea <subj> Fortore <obj> tributary <triplet> Fortore <subj> Adriatic Sea <obj> mouth of the watercourse <triplet> Ofanto <subj> Adriatic Sea <obj> mouth of the watercourse