WThe Angat Watershed Forest Reserve is a conservation area that protects the drainage basin in the southern Sierra Madre range north of Metro Manila in the Philippines where surface water empties into the Angat River and its tributaries. It is spread over an area of 62,309 hectares in the eastern portion of Bulacan and northern Rizal province at an altitude of between 490 and 1,206 metres. The conservation area also extends to the provinces of Nueva Ecija and Quezon and is centered on an artificial lake created by the Angat Dam which, together with the Ipo Dam located 7.5 kilometres (4.7 mi) downstream, supply 97% of the water requirement of Metro Manila via an aqueduct system to the La Mesa Dam and Reservoir and the Balara Filtration Plant in Quezon City. The Angat Dam and Reservoir is also a major source of hydroelectricity for Metro Manila and surrounding provinces, contributing some 200 megawatts to the Luzon grid. The watershed is a popular birdwatching site and is a biodiversity hotspot containing most of the remaining closed-canopy forests in Central Luzon.
WHinulugang Taktak Protected Landscape, also known as Hinulugan Taktak, is a protected area located in Rizal, Philippines. Initially assigned as a recreation area, the waterfall area has been designated as a national park by virtue of Republic Act No. 6964 in 1990. Ten years later, it became a protected landscape in accordance to Proclamation No. 412. It is being managed by the Department of Environment and Natural Resources and the Rizal Provincial Government. As of 2003 and 2004, Hinulugang Taktak is the second most popular national park in the Philippines in terms of number of visitors.
WThe La Mesa Watershed Reservation is a protected area that preserves the only major watershed in Metro Manila, Philippines. Also known as the Novaliches Watershed, it contains the last remaining rainforest of its size in Metro Manila surrounding the La Mesa Dam and Reservoir, the primary source of potable drinking water for 12 million residents in the Manila metropolitan area. The area is under the joint administration, supervision and control of the Department of Environment and Natural Resources and the Metropolitan Waterworks and Sewerage System. It was established in 2007 through Proclamation No. 1336 issued by President Gloria Arroyo.
WThe Marikina Valley Fault System, also known as the Valley Fault System (VFS), is a dominantly dextral strike-slip fault system in Luzon, Philippines. It extends from Doña Remedios Trinidad, Bulacan in the north and runs through the provinces of Rizal, and the Metro Manila cities of Quezon, Marikina, Pasig, Makati, Taguig and Muntinlupa, and the provinces of Cavite and Laguna that ends in Canlubang.
WThe Masungi Georeserve is a conservation area in the Philippines situated in the Southern Sierra Madre range in Baras, Rizal, 47 kilometres (28 mi) east of Manila. It centers on the geological formations of Masungi Rock, at an elevation of 640 metres (2,100 ft). In 1993, the Masungit Rock and its vicinity was proposed to be declared as a Strict Nature Reserve and Wildlife Sanctuary by the Department of Environment and Natural Resources. It has been a popular destination for hikes and day trips from Manila since it opened in 2015 and started development towards Geopark status.
WThe Pamitinan Protected Landscape is a Philippine protected area of approximately 608 hectares in the Sierra Madre mountain range, just 34 kilometres (21 mi) northeast of Manila. It contains and protects the Montalban Gorge formed by the Marikina River that separates Mount Pamitinan and Mount Binacayan in the municipality of Rodriguez in Rizal. Established in 1996 through Proclamation No. 901 issued by President Fidel Ramos, the park is originally a component of the Mariquina Reserve founded in 1904 to protect the watershed of the Marikina River that supplied water to the city of Manila from the Wawa Dam located just above the Montalban Gorge in the early 1900s.
WThe 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.