Tabkin Bosumtwi shi ne kawai tabkin da ke Ghana. Tana cikin tsohuwar dutsen da ke da tasiri kusan kilomita 10.5 (6.5 mi) a diamita. Yana da kusan kilomita 30 (mil 19) kudu maso gabas na Kumasi babban birnin Ashanti kuma sanannen yanki ne na shakatawa. Akwai kusan kauyuka 30 kusa da bakin tafkin Bosumtwi, tare da yawan mutanen da ke cikin kusan Ashanti 70,000. Mafi mashahuri tsakanin ƙauyukan da yawancin masu yawon bude ido ke sauka shine Abono. Ashanti suna ɗaukar Bosumtwi a matsayin tafki mai tsarki. Bisa ga al'adun gargajiya, rayukan matattu suna zuwa nan don yin ban kwana da Allahiya Asase Ya. Saboda wannan, ana ɗaukar halal ne a cikin tabkin kawai daga katako. Daga cikin nau'ikan kifayen da ke cikin tabkin akwai Hemichromis frempongi wanda yake shi ne cichlid, da kuma cichlids na kusa-kusa-karshen Tilapia busumana da T. discolor. Kogin Bosumtwi tasirin rami yana da kilomita 10.5 (mi 6.5) a faɗi, ya ɗan fi girma fiye da tafkin yanzu wanda yake kusan kilomita 8 (5.0 mi) a ƙetaren, kuma an kiyasta shekarunsa sun kai miliyan 1.07 (zamanin Pleistocene).