Prapovijesno gradinsko naselje Grad u Nakovani jedno je od najistaknutijih naselja iz brončanog i željeznog doba na južnom dijelu istočnojadranske obale. O njegovoj važnosti kao i kompleksnom kulturnom krajoliku u kojem se nalazi, osim do sada pronađene materijalne ostavštine, svjedoče i brojne kamene gomile koje se nalaze u okolici Grada, posebno na brdu Zmijnoj. S obzirom na pretpostavljenu kontinuiranu naseljenost Grada sve do kraja željeznog doba, očekivalo se i postojanje ravnih grobova, što su istraživanja provedena 2020. godine i potvrdila. Na južnim padinama brda Zmijne otkrivena su dva groba na ravnom smještena u blizini mlađih kamenih gomila. Grob smješten pri vrhu brda, na osnovi pronađenih nalaza, datiran je u starije željezno doba. Ostatci više pokojnika bili su položeni u prirodnu udubinu i pokriveni većim kamenim blokovima. U grobu su, osim keramičkih ulomaka, pronađeni predmeti nakita i nošnje koji upućuju na kulturne kontakte sa zaleđem te prostorom zapadnog Balkana na kojem je starije željezno doba obilježeno razvojem glasinačke kulture.The prehistoric hillfort settlement of Grad in Nakovana is one of the most prominent Bronze and Iron Age settlements on the southern part of the eastern Adriatic coast. Its importance and the complex wider cultural landscape are reflected not only in the material legacy found so far, but also in the numerous stone mounds around Grad, especially on the hill of Zmijna. Since it was presumed that Grad was continuously inhabited until the end of the Iron Age, it was expected to find flat graves, which were in fact discovered during the excavations of 2020. On the southern slopes of Zmijna hill, two flat graves were discovered near younger stone mounds. The grave located near the top of the hill was dated to the Early Iron Age based on the finds. The remains of several individuals were laid in a natural depression and covered with large stone blocks. The grave contained potsherds, but also jewellery and costume items indicating cultural contacts with the hinterland and the area of the western Balkans, where the Early Iron Age was characterized by the development of the Glasinac culture
