Explore details about location Unka - Grk. Unka - Grk is a location situated within the Opština Bosanski Brod alongside other areas such as D.Kolibe - G.Kolibe, Ивана Косанчића, Доситеја Обрадовића. Additionally, some smaller parts of Unka - Grk include specific areas like Žeravac - D.Višnjik, Žeravački Potok, G.Kolibe - Unka adding to the diversity of its landscape.