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 Lake (California) winter. Laguna Lake (California) Laguna Lake is a shallow natural lake at the head of the Chileno Valley. Although Laguna Lake is officially classified as a vernal pool, it retains some water year round. The 200-acre lake is wide and long, straddling the Sonoma-Marin county line in northern California, United States. It is the source of Chileno Creek which flows west to Walker Creek. It was included in the Rancho Laguna de San Antonio Mexican land grant, which was given to Bartolomé Bojorquez in 1845. Laguna Lake is used extensively for migrating and breeding waterfowl, including whistling swans ("Cygnus columbianus")