Manila Bay, bay of the South China Sea extending into southwestern Luzon Island, Philippines. Almost completely landlocked, it is considered one of the world’s great harbours and has an area of 770 sq mi (2,000 sq km) with a 120-mi (190-km) circumference. Its widest diameter, from northwest to southeast, measures 36 mi. Corregidor Island, 30 mi west of Manila, divides the bay’s 11-mi-wide entrance into two channels—the seldom used South Channel and the safer, 2-mi-wide North Channel between Bataan Peninsula and Corregidor. (From https://www.britannica.com/place/Manila-Bay)

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