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 de Sayula closed Sayula-Atotonilco basin form part of the endorheic lakes of the neo-volcanic axis. But Laguna de Sayula is especially important because of its relation to the migratory habitats of the North American birds. Because the lake is salty, the vegetation found nearby is highly tolerant to salt. Along with these, there are low-lying vegetation that surrounds the lake.. The aquatic plants found in the lake is sparse, and can only be found in small pockets of freshwater in the area. The tropical deciduous forest vegetation can be found in higher altitudes, atop of hills and islands on the lake. The