Caldera of Mount Pinatubo, Luzon http://commons.wikimedia.org/wiki/File:Mount_Pinatubo_20081229_02.jpg Chris Tomnong
Luzon is the biggest, most populous and most developed of the islands in the Philippines. It is also the location of the capital of the country, Manila. Luzon is the main island in the Luzon Group of islands, which includes the Batanes and Babuyan group of islands to the north, and the Cantanduanes, Marinduque, Masbate, Romblon and Mindoro islands to the south.
Luzon covers an area of 104,688 sq km (40,420 sq mi). 8 of the 17 administrative regions of the Philippines are located on it. The highest point on Luzon is Mount Pulag, standing at 2,922m (9,587 ft). It is the third highest mountain in the Philippines. Other major mountains in Luzon includes Mount Pinatubo, Mount Mayon and Taal Volcano.
The Cagayan River, at 505km (314mi) is both longest river in Luzon is also the longest in the country. Central Luzon (Region III) has the largest plain in the country, and is also the main producer of rice in the Philippines.