Yen Minh is the third district situated on the National road number 4C. It is 54 kilometer from Quan Ba and 48 kilometer from Dong Van including, one town and eighteen communes. The district is created by two kinds of rocky (limestones and terrigenous karst). According to result search of the scientists, there are many Geoheritages has found in these area. Especially, tectonic- geomorphic heritage; karst cave and hydro-geology.