Kithulgala Belilena, one of the most engaging and vital ancient caves in the country, holds the secret of a lost age some 12,000 years ago. One can reach the cave by driving approximately 80 km through the Colombo-Hatton highway. There are significant pieces of proof to determine the view of Dr P.E.P Deraniyagala that the human settlements in Sri Lanka might have started as old as the Pleistocene Age. The knowledge about Homo Sapiens who live 624 m above sea level relating to Pleistocene Age found from Kithulgala Belilena, a principal human settlement adjacent to Kelani River, was a great help to enhance the knowledge about aborigines.
Two fossilized bones of anthropoid lived 3,000 years back and 22,000 years ago that directly have relationships with the 12,000 B.C. period have been identified through excavations done in Belilena.