Lake Bosumtwi, the only natural lake in Ghana, is situated about 30 km south-east of Kumasi and is approximately 8 km across. This large crater lake is situated within an ancient impact crater. The lake is a popular recreational area. The Ashanti consider Bosumtwi a sacred lake. According to traditional belief, the souls of the dead come here to bid farewell to the god Twi. Because of this, it is considered permissible to fish in the lake only from wooden planks.