Geography of the Philippines Bay. Laguna de Bay, east of Manila Bay, is the largest freshwater lake in the Philippines. Several rivers have been harnessed for hydroelectric power. To protect the country's biological resources, the government has taken a first step of preparing a Biodiversity Action Plan to address conservation of threatened species. The islands are volcanic in origin, being part of the Pacific Ring of Fire, and are mostly mountainous. The highest point in the country is the peak of Mount Apo in Mindanao, which is above sea level. The second highest point can be found on Luzon at Mount Pulag, a peak
Laguna (province) resources of Laguna are in its agriculture and fisheries, owing to its position near the Laguna de Bay and the surrounding lowlands. There are about forty rivers in Laguna with a total area of almost . The Laguna de Bay has an approximate area of broken down into of land and of lake proper with shoreline. The shores of Laguna de Bay provide fishing grounds capable of producing of fish, or roughly two-thirds of the fresh water fish requirements of Metro Manila. Laguna has an estimated 300 million US gallons (1,100,000 m³) of underground water. At least seven principal water