Bleduk Kuwu, District Kradenan, Grobogan Regency, Central Java, Indonesia

Legend
Aji Saka legend also mentioned that the Bledug Kuwu mud volcano in Grobogan Regency was the place where the giant serpent Jaka Linglung appear before defeating Prabu Dewata Cengkar. Van der Meulen suggest, although not quite confinced, that Medang Kamulan refer to "Hasin-Medang-Kuwu-lang-pi-ya" suggested by van Orsoy in his article about Ho-Ling kingdom mentioned in Chinese record.