Lake Maughan is a volcanic lake located in T'Boli, South Cotabato in Mindanao. It is the water-filled crater of Mount Parker - a dormant volcano. It has a 2.9-km-wide caldera with steep walls that rise 200-500m.
Tribally called as Malibengoy which is a sacred place for the T'boli people. It is one of the best places in the country unspoilt by development.