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 Lakeshore Expressway Dike southern part of Metro Manila and Laguna, as well as a dike that would mitigate flooding in the western coastal communities along Laguna Lake. The expressway will cost an estimated PHP36.74 billion or US$854.42 million. When constructed, it is expected to ease traffic congestion along Muntinlupa and Calamba area, and to serve as flood control measure for communities on the western shore of Laguna de Bay. The route alignment starts from Bicutan, Taguig connecting to the proposed C-6 Expressway Road Project. It traverses southwards passing the city boundaries of Taguig, Parañaque and Muntinlupa in the southern part of Metro Manila