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
Rancho Laguna (Alemany) of Laguna Lake. With Laguna Lake Park, the Laguna Lake Natural Reserve encloses the most of the shoreline of the lake and the lower reach of Prefumo Creek and its delta on the shore of the lake (following its diversion into the late 1950's), omitting only the northernmost area, called the Northwest Inlets. The reserve also encloses a strip of grasslands to the northeast of the lake to near the crest of the serpentine rock ridgeline. Rancho Laguna (Alemany) Rancho Laguna part of the grazing lands granted to Mission San Luis Obispo de Tolosa in 1844, surrounding Laguna Lake at