The "'Ombla "'is a influent stream flowing in Popovo Polje, in the immediate hinterland of the Ombla.
2.
Popovo Polje is one of the largest polje ( karstic plain ) in Bosnia and Herzegovina and the world, famous for its karstic phenomenons and features, and particularly for its Trebianjica River, which flows through the polje as largest sinking river ( also " losing stream ", or " influent stream " ) the world, as well as the Vjetrenica cave system, located to the west / south-western parts of the valley.
3.
Popovo polje is one of the largest " polje " ( karstic plains ) in Bosnia and Herzegovina and the world, famous for its karstic phenomenons and features, and particularly the Trebianjica river, which flows through the polje as the largest sinking river ( also " losing stream ", or " influent stream " ) in the world, as well as the Vjetrenica cave system, located to the west / south-western parts of the valley.