Punch Bowl basin is analysed for the earth science and terrain factors such as geology, geophysical features, topography and water systems. The study area is composed of two kinds of rocks : Jurrasic granite in the central part and Precambrian metamorphic complex in the marginal part of she basin. The depth of the base rock is about 20 to 40 meters below the surface at the center of the basin. The process which has formed the basin may be the differential weathering of the rocks. The morphology of the slope of the basin is concave and the slope is about 20° above the nickpoint and about 5° below it. The water system of the region is very poor in drainage pattern.