Mud cove
Trpanj's lagoon Blace is covered in therapeutic mud. According to the research carried out by the Rehabilitation and Physical Medicine Institute of Zagreb University, Faculty of Medicine (1969), Physiatric Institute of Sarajevo (1966), and other foreign institutions, usage of this mud is much more efficient in treatment of various rheumatic deseases and female genital deseases than the treatment in some other well known Adriatic treatment centres.