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 (province) is composed of over 200 dormant and monogenetic maars, crater lakes, scoria cones and stratovolcanoes, the tallest of which is Mount Makiling at in elevation. San Pablo itself is known for its seven crater lakes, the largest of which is Lake Sampaloc. Apart from the Laguna de Bay and the Seven Lakes of San Pablo, there are also two reservoir lakes that can be found in Laguna, the Lake Caliraya and Lumot Lake. These two man-made lakes were formed by the creation of the Caliraya Dam and the Lumot Dam. Due to its proximity to Laguna de Bay, Laguna is