sentences:  Nglanggeran primeval volcano in the Patuk area is only 600 meters high but there are excellent views from the peak to the north towards Mount Merapi and to the south across to the coast of Java.Scattered giant granite and andesite rock formations called "watu wayang" (puppet rocks) are found at the Mt Nglanggeran area as well as a nearby man-made lake.It takes around 3 hours to hike from the Pendopo Kali Song entrance point to the peak.