A vast wetland ecosystem spanning over 288,000 hectares across Maguindanao, Sultan Kudarat, and North Cotabato, making it the largest marsh in Mindanao. The marsh is home to over 100 bird species, the Philippine crocodile, and serves as a vital flood control system. Boat trips through the marsh reveal traditional Maguindanaoan fishing villages and diverse wildlife.
| Category | Nature |
| Province | Maguindanao del Norte |
| Region | BARMM - Bangsamoro |
| Coordinates | 6.95000000, 124.35000000 |