1915. Humidity levels are usually very high all year round. Manila has a distinct dry season from December through April, and a relatively lengthy wet season that covers the remaining period with slightly cooler temperatures. In the wet season, it rarely rains all day, but rainfall is very heavy during short periods. Typhoons usually occur from June to September. Cityscapes Parks There are four national parks in Metro Manila. These are the Rizal Park, Paco Park, and Fort Santiago in the City of Manila and Quezon Memorial National Park in Quezon City. Rizal Park and Paco Park are managed by the National Parks and Development Committee (NPDC), while Fort Santiago is managed by the Intramuros Administration. A tripartite agreement between the Quezon City Government, the National Historical Institute and the NPDC transferred the management of Quezon Memorial National Park to the Quezon City Government. The region also has three protected areas, namely the Rizal Park, Ninoy Aquino Parks & Wildlife Center and the Manila Bay Beach Resort. Rizal Park, also known as Luneta Park, is considered the largest urban park in Asia with an area of . The park along with the historic walled area of Intramuros are designated as flagship destination to become a tourism enterprise zone according to the Tourism Act of 2009. Paco Park is a recreational garden which was once the city's municipal cemetery built by the Dominicans during the Spanish colonial period. Filipino Landscape architect IP Santos, the "Father of Philippine Landscape Architecture", was commissioned to do the design of converting the former cemetery into a park. Manila Zoo is the oldest zoo in Asia, which was founded in 1959. It is the home to more than a thousand animals from 90 different species including the 40-year-old elephant, Mali. The zoo has an average of 4,000 visitors weekly. An estimated 40,000 tourists visit the zoo each month. La Mesa Ecopark is a 33-hectare well-developed sanctuary around the La Mesa Watershed. It was established through a joint partnership between the Metropolitan Waterworks and Sewerage System, ABS-CBN, and the Quezon City Government. La Mesa Ecopark, along with the Ninoy Aquino Parks & Wildlife Center, are important nature reserves in the Philippines. The Las Piñas-Parañaque Critical Habitat and Ecotourism Area (LPPCHEA) was declared as a critical habitat by the Government of the Philippines in 2007 and was listed by the Ramsar Convention as a Wetland of International Importance