Calabarzon, formally known as Southern Tagalog Mainland and designated as Region IV-A, is an administrative region in the Philippines. The region comprises five provinces: Cavite, Laguna, Batangas, Rizal, and Quezon, and one highly urbanized city, Lucena. The region is the most populous region in the Philippines according to the Philippine Statistics Authority, having over 14.4 million people inhabitants in 2015, and is also the country's second most densely populated after Metro Manila.
Laguna de Báý or Laguna Lake is the largest lake in the Philippines. It is located east of Metro Manila, between the provinces of Laguna to the south and Rizal to the north. A freshwater lake, it has a surface area of 911–949 km², with an average depth of about 2.8 metres and an elevation of about 1 metre above sea level. The lake is shaped like a stylized 'W', with two peninsulas jutting out from the northern shore. Between these peninsulas, the middle lobe fills the large volcanic Laguna Caldera. In the middle of the lake is the large island of Talim, which falls under the jurisdiction of the towns of Binangonan and Cardona in Rizal province.
The Pasig River is a river in the Philippines that connects Laguna de Bay to Manila Bay. Stretching for 25 kilometres (15.5 mi), it bisects the Philippine capital of Manila and its surrounding urban area into northern and southern halves. Its major tributaries are the Marikina River and San Juan River. The total drainage basin of Pasig River, including the basin of Laguna de Bay, covers 4,678 square kilometres (1,806 sq mi).
Los Baños, officially the Municipality of Los Baños, is a 1st class municipality in the province of Laguna, Philippines. According to the 2015 census, it has a population of 112,008 people.
Bay,, officially the Municipality of Bay,, is a 2nd class municipality in the province of Laguna, Philippines. According to the 2015 census, it has a population of 62,143 people.
Calauan, officially the Municipality of Calauan,, is a 2nd class municipality in the province of Laguna, Philippines. According to the 2015 census, it has a population of 80,453 people.
Santa Cruz, officially the Municipality of Santa Cruz,, is a 1st class municipality and capital of the province of Laguna, Philippines. According to the 2015 census, it has a population of 117,605 people.
Cabuyao, officially the City of Cabuyao, or simply known as Cabuyao City, is a 1st class city in the province of Laguna, Philippines. According to the 2015 census, it has a population of 308,745 people.
Tanay, officially the Municipality of Tanay, is a 1st class municipality in the province of Rizal, Philippines. According to the 2015 census, it has a population of 117,830 people.
General Mariano Alvarez, officially the Municipality of General Mariano Alvarez,, is a 1st class municipality in the province of Cavite, Philippines. According to the 2015 census, it has a population of 155,143 people.
Jalajala,, officially the Municipality of Jalajala,, is a 4th class municipality in the province of Rizal, Philippines. According to the 2015 census, it has a population of 32,254 people.
San Juan, officially the Municipality of San Juan,, is a 1st class municipality in the province of Batangas, Philippines. According to the 2015 census, it has a population of 108,585 people.
Abra de Ilog, officially the Municipality of Abra de Ilog,, is a 2nd class municipality in the province of Occidental Mindoro, Philippines. According to the 2015 census, it has a population of 31,306 people.
Marikina River is a river in eastern Metro Manila, Philippines. It is a tributary of Pasig River with headwaters located in the Sierra Madre Mountains in Rodriguez, Rizal province.
The Tunasan River, also referred to as the Tunasan-Cuyab River, is a river system in the Philippines. This river begins in Dasmariñas, Cavite, and ends 9 kilometres (5.6 mi) at the border of Muntinlupa, and San Pedro, Laguna. It is one of 21 major tributaries of Laguna de Bay.
The Morong River, also referred to as the Morong-Teresa River, is a river system in Rizal, Philippines. It is one of 21 major tributaries of Laguna de Bay. It covers 14 barangays and stretches 10 kilometres (6.2 mi) from Antipolo City down to Teresa, Rizal, Morong, Rizal and finally to Laguna de Bay.
The Santa Cruz River is a river system in Santa Cruz, Laguna on the island of Luzon, in the Philippines.
The San Juan River known to be as Calamba River, is a river system in Calamba City, Philippines. It is one of 21 major tributaries of Laguna de Bay and is regularly monitored by the Laguna Lake Development Authority (LLDA) through one of its 15 river monitoring stations.
The Pangil River, also known as the Bambang Hari River, is a river system that runs through Pangil, Laguna in the Philippines. It is one of 21 River tributaries of Laguna de Bay and is regularly monitored by the Laguna Lake Development Authority(LLDA) through one of its 15 river monitoring stations.
The Upper Marikina River Basin Protected Landscape is a protected area in the Province of Rizal in the Philippines, which forms the upper area of the drainage basin of the Marikina River.
