Esterzili, Istersili or Stersili in sardinian language, is a comune in the Province of South Sardinia in the Italian region Sardinia, located abo…Esterzili, Istersili or Stersili in sardinian language, is a comune in the Province of South Sardinia in the Italian region Sardinia, located about 100 kilometres north of Cagliari. Esterzili borders the following municipalities: Escalaplano, Nurri, Orroli, Sadali, Seui, Ulassai.