Osun is known as the land of living spring. The annual Osun Oshogbo festival displays the rich cultural heritage of the Yoruba community for two weeks. The dense forest of the Osun sacred groove, on the outskirts of the city of Oshogbo, is one of the last remnants of primary high forest in the South West Nigeria. Regarded as the abode of the gods of fertility, Osun, one of the pantheons of Yoruba gods, the landscape of the grove and its meandering river is dotted with sanctuaries and shrines, sculptures and art works in honour of Osun and other deities. The sacred grove, which is now seen as a symbol of identity for all Yoruba people, is probably the last in Yoruba culture. It testifies to the once widespread practice of establishing sacred groves outside all settlements.

http://africantourist.com.ng/osun-osogbo-festival-the-glamour-the-excitement/