Asia, Philippines, South Cotabato. The T’boli tribe has given each of the seven waterfalls a name: the first is called “Hikong Aluâ€, meaning “Passageâ€; “These are located in Lake Sebu, South Cotabato, These secrets of lush forests are the rewards to those who undertake the tedious ascent or steep descent of their locations. The seven waterfalls are part of a mountain river that flows down to the lowland areas.