The Sapalewa River flows underground between the villages of Taniwel and Buria through the mountains of Hatu Toi Siwa, currently explored for about 3.7 kilometers.
Sungai Sapalewa mengalir di bawah tanah antara desa Taniwel dan Buria menembus pegunungan Hatu Toi Siwa, sekarang telah dijelajahi sejauh 3,7 kilometer.