Many Geothermal Energy Source in Indonesia Country's, it's because Indonesia location consist of 3 part tectonic plates. The Exploration and development study of geothermal as part to find alternative resources energy. It may happen something like decrease carrying capacity of environmental. Manifestations of Geothermal are indication on the earth surface what we call have an activity thermal inside into the earth. Its process happen, because of holes inside dee into the earth it may geothermal fluid like stea or geyser let out to the surface on the earth. Characteristic of manifestations consist of Chlor (Cl), SO 4, HCO 3, pH, and temperature. The Result from Surveying in the Parakan Salak site founded four kinds of geothermal manifestations there are geyser, hot water reservoir, mudpool, and mudpool with geyser. The result shows have differences elevation and nearest with location of geothermal sources.