Land and Resources, Rivers and Lakes
The principal islands of the Philippines are traversed by large rivers, some of which are navigable. The longest river of the republic is the Cagayan, in north central Luzon. Other important rivers of Luzon include the Agno and Pampanga, crossing the Central Luzon Valley; the Chico, flowing through the Cordillera Central and irrigating the mountainside rice terraces; the Pasig, a commercially important artery flowing through Manila; and the Bicol, the primary river of the Bicol Peninsula. The principal rivers of Mindanao are the Mindanao (Rio Grande de Mindanao), which receives the waters of the Pulangi, and the Agusan.
Laguna de Bay, 13 km (8 mi) southeast of Manila, is the largest lake of the Philippines. Lake Taal, 56 km (35 mi) south of Manila, occupies a huge volcanic crater and contains an island that is itself a volcano, with its own crater lake. Lake Lanao is the largest lake of Mindanao and the source of the Agusan River, which exits the lake in the spectacular Maria Christina Falls.
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