Kalasin is one of the most fertile provinces in the northeastern region and has a long history dating back to the prehistoric era. Kalasin contains the largest concentration of Jurassic era dinosaur fossils in northeastern Thailand, located in Phu Kum Khayo where archaeologists have excavated whole fossils of Sauropods. Another ancient site located near Kalasin is Fa Daet Song Yang. Excavations there have revealed several remnants and artifacts of monuments and temples that provide evidence of prehistoric inhabitation. According to archaeological evidence, the area was once inhabited by the Lawa tribe, whose Lavo civilization dates back about 1,600 years.