Model farms were established at Livno and at Gacko, on the Montenegrin border; a school of viticulture near Mostar; a model poultry-farm at Prijedor, close to the Croatian boundary;.
North of Mostar, it cleaves a passage through the celebrated Narenta defile, a narrow gorge, 12 m.
- Along the Dalmatian border, and through the centre of Bosnia, runs the backbone of the Dinaric Alps, which attain their greatest altitudes (6000-750o ft.) near Travnik, Serajevo and Mostar.
west-north-west of Mostar to the bend of the river Narenta, differs in many respects from the larger territory.
The surface of some, as notably the Mostarsko Blato, lying west of Mostar, is marshy, and in spring forms a lake; others are watered by streams which disappear in swallow-holes of the rock, and make their way by underground channels either to the sea or the Narenta.