Split off from Udon Thani in 1993, Nong Bua Lam Phu is a scenic province
famous for its prehistoric sites. Fossilised shells about 140 million years old can be seen in the cliffs 10 kilometres outside the main town;archaeological sites at Kudkwangsoi villages are also attractions. Well worth a visit is the huge Erawan Cave, Full of beautiful stalagmites and stalacitites. A very long stairway leads up to the cavern, where a large Buddha sits at the entrance.