Whole coast around Primorsko is full of ruins ancient and wonderful towns. One of the largest fortresses - Ranuli rises on the peak Wolf cale. It was a regional centre in Medieval times.
In 2003 around 2-3 killometers from the fortress wall found an almost untouched by time sanctuary - observatory of Ranuli, built from large stones, arranged in irregular circles and in certain days the sun rays pass through them. Also was located an altar, a throne and the largest dolmen known to science. It was built in the XIV century B.C. and it is considered to have been used till the V century B.C.