Maracaibo, Lake, largest lake of South America, c.5,100 sq mi (13,210 sq km), NW Venezuela, extending c.110 mi (180 km) inland. A strait, 34 mi (55 km) long, connects it with the Gulf of Venezuela. Discovered in 1499 by the Spanish explorer Alonso de Ojeda, the lake lies in the extremely hot, humid lowlands of the Maracaibo basin, a region that, almost enclosed by mountains, is semiarid in the north but has an average annual rainfall of 50 in. (127 cm) in the south. The basin is one of the major oil-producing areas of the world, and was developed beginning in 1918. Although petroleum production is the most significant economic activity locally, sugarcane, cacao, and livestock are raised. In addition, fish are caught in the lake, despite pollution from agricultural runoff and oil spills. Lake Maracaibo, with the Catatumbo River, its chief tributary, is a major artery of communication for products of the adjacent region and those of the Colombian-Venezuelan highlands. A dredged channel gives oceangoing vessels access to the lake. Cabimas and the port of Maracaibo are the principal cities on the lake. Gen. Rafael Urdaneta Bridge (c.5 mi/8 km long; completed 1962), spanning the lake's outlet, is one of the longest bridges in the world.

Maracaibo, city (1990 pop. 1,249,670), capital of Zulia state, NW Venezuela, at the outlet of Lake Maracaibo. It is Venezuela's second largest city, a commercial and industrial center, and the oil capital of South America. Besides oil, exports include lumber, processed textiles, and soap. Maracaibo was founded in 1571. In the 17th cent., it was sacked five times, notably by Sir Henry Morgan in 1669. Until the establishment of the oil industry after 1918, Maracaibo was extremely underdeveloped; but exploitation by foreign interests of the vast petroleum resources of the Maracaibo basin resulted in a rapid expansion and modernization of the city. The dredging of the lake also increased Maracaibo's importance as a shipping point for inland products. The c.5-mi-long (8-km) Gen. Rafael Urdaneta Bridge is south of the city. Maracaibo has a university.

Inlet of the Caribbean Sea, northwestern Venezuela. The largest natural lake in South America, it occupies an area of 5,130 sq mi (13,280 sq km), extending southward for 130 mi (210 km) from the Gulf of Venezuela and reaching a width of 75 mi (121 km). Many rivers flow into the lake, notably the Catatumbo River. It is in one of the world's richest oil-producing regions, which supplies about two-thirds of Venezuela's total petroleum output. Its oil fields are located along the eastern shore, extending 20 mi (32 km) into the lake.

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City (pop., 2000 est.: 1,764,038), northwestern Venezuela. Located on the channel connecting Lake Maracaibo with the Gulf of Venezuela, it is Venezuela's second largest city. Founded in 1571 as Nueva Zamora, it became a centre for inland trade after Gibraltar, at the head of the lake, was destroyed in 1669. It changed hands several times during Venezuela's struggle for independence from Spain. Within a decade of the discovery of oil in 1917, it became the oil metropolis of Venezuela and South America.

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Inlet of the Caribbean Sea, northwestern Venezuela. The largest natural lake in South America, it occupies an area of 5,130 sq mi (13,280 sq km), extending southward for 130 mi (210 km) from the Gulf of Venezuela and reaching a width of 75 mi (121 km). Many rivers flow into the lake, notably the Catatumbo River. It is in one of the world's richest oil-producing regions, which supplies about two-thirds of Venezuela's total petroleum output. Its oil fields are located along the eastern shore, extending 20 mi (32 km) into the lake.

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