Luzon
Central Luzon

The central section of Luzon is characterized by a flat terrain, known as the Central Luzon plain, the largest in the island in terms of land area. The plain, approximately 11,000 square kilometres (4,200 sq mi) in size, is the country's largest producer of rice, and is irrigated by two major rivers; the Cagayan to the north, and the Pampanga to the south. In the middle of the plain rises the solitary Mount Arayat.

The western coasts of Central Luzon are typically flat extending east from the coastline to the Zambales Mountains, the site of Mount Pinatubo, made famous because of its enormous 1991 eruption. These mountains extend to the sea in the north, forming Lingayen Gulf, and to the south, forming the Bataan Peninsula. The peninsula encloses Manila Bay, a natural harbor considered to be one of the best natural ports in East Asia, due to its size and strategic geographical location.

The Sierra Madre mountain range continues to stretch across the western section of Central Luzon, snaking southwards into the Bicol Peninsula.
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