The purpose of the project was to assess the cultural significance of the sites, to protect the cultural heritage, in addition to beginning research and studies at the sites.[13] Corrales and Badilla produced a booklet entitled El Paisaje Cultural del Delta del Diquís which provides a quick overview on the history of the Diquís Delta, the history of banana plantations and the UFCO, the natural environment, archaeological sites in the region, and the importance of the Diquís region as an UNESCO World Heritage Site.[14] Research has continued in the region by Corrales and Badilla focusing on the archaeology and the Precolumbian political structure in the Diquís Delta. Research emphasis was on chiefdoms and their associated archaeological indicators. Their objectives were to study the archaeological sites containing stone spheres in the Diquís Subregion to gain an understanding of community configuration, activity areas, sequences of occupation, and the recording of monumental architecture.[15]