There are two towers situated on a mountain plateau south of Jelsa: the Greek-Illyrian Tower Tor from the IV ct. BC and the mediaeval town-fortress Galesnik. Galesnik is situated 210 m above sea level. It is 20 m wide, surrounded by a wall 80 m long, 4 m high and 50 - 60 cm thick. The walled-in area is 1,520 square meters. The rectangular building, measuring approximately 40 square meters, is partially preserved.