Calabarzon strategic importance, Corregidor is found at the mouth of Manila Bay and is under the jurisdiction of Cavite City. Laguna has rugged terrain, with narrow plains near the shores of Laguna de Bay and mountainous ranges further inland. Laguna de Bay is the largest lake in the Philippines, and is named after the town of Bay. Laguna is also home to Mount Makiling, a dormant volcano near Los Banos reputed for its mystical properties. There are also a lot of hot springs near the Makiling area, especially in San Pablo. Another famous landmark in Laguna are the Pagsanjan Falls, in
Laguna Lake Development Authority in their emissions, need to pay fines or lake “user–fees”. The system encourages companies to invest in and operate pollution prevention and/or abatement systems in their establishment. Applying the "polluter pays principle", the system effects direct accountability for damage inflicted on the integrity of the Laguna de Bay region thereby encouraging individuals and business establishments to internalize into their decision-making process the environmental impacts of their day-to-day activities. The EUFS covers all enterprises in the administrative jurisdiction of LLDA that discharge wastewater in the Laguna de Bay system. These include commercial and industrial establishments; agro-based industries and establishments (such as