Mount Diwata, colloquially nicknamed as Diwalwal, is a remote 1,261-metre high range of volcanic mountain and biodiversity area in Davao Region in the eastern part of Mindanao island of Philippines. Rich in gold and copper ores and mines, it is spread across the 3 municipalities: (a) Monkayo in the province of Davao de Oro; as well as Cateel and Bos…Mount Diwata, colloquially nicknamed as Diwalwal, is a remote 1,261-metre high range of volcanic mountain and biodiversity area in Davao Region in the eastern part of Mindanao island of Philippines. Rich in gold and copper ores and mines, it is spread across the 3 municipalities: (a) Monkayo in the province of Davao de Oro; as well as Cateel and Boston in the province of Davao Oriental. Laguna Copperplate Inscription, the oldest written document in Philippines dated to 900 CE, refers to Mount Diwata.