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
Tadlac Lake de Bay is thinnest northeast of the lake with only about wide piece of land separating it from the larger lake. The Tadlac Barangay Road runs east of the lake but does not circle the lake. Another road runs west of Alligator lake. The lands around the lake are privately owned, and some owners have established resorts around the lake. The Laguna Lake Development Authority (LLDA), as mandated by the government, manages Laguna de Bay and its surrounding areas including Alligator Lake. Lake overturns or carbon dioxide (CO) eruption from deep within, locally called as "langal", normally occurs during the