The widely known kilometre-long sandy beaches Duće and Jesenice with their unique wooden sailboats hide an unusual history that begins far from today’s shores, in the hinterland between the sea and Zamosorje. There, above the hamlet of Zeljovići, is the Pećina or Turska peć cave, an important prehistoric site that preserves the oldest known traces of human life in the area of Poljica-Omiš. About a hundred metres down, towards the west, there is another smaller cave, called Ponistrice, in the foundations of which a flint tool was found, testifying to the presence of man from the Lower Palaeolithic.
In the past, inhabitants of the Poljica area built fortifications on the heights for their safety, and in so doing were able to supervise the surrounding areas. In Jesenice and Duće on the slopes of Mount Perun, there was not much arable terrain and the land was mainly owned by the Archdiocese of Split and the nobles from Split and Omiš, so settlements were carefully compacted and built in rows, preserving the fertile soil. The Immaculate Virgin Church in Jesenice, with a clock on the facade, obtained its altar as a vow from one of the local residents.