Osun Osogbo Sacred Grove. The grove covers 75 ha of ring-fenced forest alongside the Osun River on the outskirts of Osogbo town, Western Nigeria. The grove in Yoruba cosmology is the domicile of Osun, the goddess of fertility. Ritual paths lead devotees to 40 shrines, dedicated to Osun and other Yoruba deities, and to nine specific worship points beside the river. Osun is the Yoruba personification of the ‘waters of life’ and the spiritual mother of the Osogbo township.