Graničnik, a stone monolith, marking the north-western border of the territory of the previous Republic of Dubrovnik, is situated by the edge of the road lead leading from Imotica towards Neum. It bears the engraving: CONFINE TURCO KLEP 1728.

It was put in place after the Turkish-Venetian-Austrian war of 1715 to 1718, when it was agreed, at the Treaty of Požarevac, that the area of the Dubrovnik Republic should maintain a direct territorial connection with Turkey. This allowed the Dubrovnik Republic to maintain the Turkish enclaves (Neum, Klek, Sutorina) between Venice and Dubrovnik and ensured undisturbed trade with the hinterland and Turkish provinces in general.