Peninsula, southeastern Luzon , Philippines.
It has a lengthy coastline with large subpeninsulas. Its area is about 4,660 sq mi (12,070 sq km). It includes the Bicol Plain, a large lowland area important in rice production. It is densely populated though largely rural. It is the homeland of the Bicol, the country's fifth largest ethnolinguistic group, and it has been a stronghold of Philippine communists.