Muntinlupa, officially the City of Muntinlupa (Tagalog: Lungsod ng Muntinlupa), or simply known as Muntinlupa City, is a 1st class highly urbanized city in Metro Manila, Philippines. According to the 2015 census, it has a population of 504,509 people. Classified as a highly urbanized city, it is bordered on the north by Taguig; to the northwest by Parañaque; by Las Piñas to the west; to the southwest by Bacoor and Dasmariñas; by San Pedro and Laguna de Bay to the east, the largest lake in the country. It is given the nickname "Emerald City" by the tourism establishment and also known as the "Gateway to Calabarzon" as it is the southernmost city of the National Capital Region. Muntinlupa is known as the location of the national insular penitentiary, the New Bilibid Prison, where the country's most dangerous criminals were incarcerated, as well as the location of Ayala Alabang Village, one of the country's biggest and most expensive residential communities, where many of the wealthy and famous live.