The city acquired its modern outline in the early 1900s, and extensive public sanitation and remodeling are continuing. Hills have been leveled, tunnels bored (the longest underground urban highway, linking the northern and southern sections of the city, opened in 1968), parts of the bay filled, parks laid out, and beautiful palm-lined drives built to connect the various districts. Favellas, or slums, are interspersed throughout the city.
Rio's harbor is deep enough for the largest vessels to come alongside the wharves, which lie near the city center. Through the port flows the major portion of Brazil's imports and exports (iron ore, manganese, coffee, cotton, meat, and hides). Rio is also a distribution center for the coastal trade. The city's manufactures include textiles, foodstuffs, household appliances, cigarettes, chemicals, leather goods, metal products, and printed material. There are two major airports.
Rio's climate is warm and humid, and although the city remains a major tourist center, its success has been hampered by a serious crime problem. Of particular attraction are the crescent-shaped beaches, especially Ipanéma and the Copacabana, with its mosaic sidewalks. The most popular holiday is the pre-Lenten carnival, with its colorful street processions and reveling Cariocas (citizens of Rio).
Examples of Rio's famous modern architecture are the ministry of education, the Brazilian press association headquarters, and the museum of modern art. Older buildings house the national library, the municipal opera house, and several museums. The Itamarati Palace is also noteworthy. Foremost among educational institutions are the Univ. of Guanabara (formed 1920 as the Univ. of Rio de Janeiro), the Univ. of Brazil, now partly housed in the University City on Guanabara Bay, and the Catholic Univ.; there are also military and naval academies, the Oswaldo Cruz biological research center, and other scientific institutes. Notable churches include the ornate Candelária Church, the 18th-century Church of Nossa Senhora da Glória, the 17th-century Franciscan convent, and a 16th-century Benedictine monastery. Rio has beautiful subtropical parks, including the Quinta da Boa Vista (a former estate of the emperors) and the botanical garden (founded 1808). The sports stadium is one of the world's largest.
According to tradition, the Rio de Janeiro area was visited in Jan., 1502, by Portuguese explorers who believed Guanabara Bay to be the mouth of a river; it was therefore named Rio de Janeiro. It is more likely that the region was discovered in 1504 by Gonçalo Coelho. In 1555 the French Huguenots established a colony, but they were driven out (1560-67) by Mem de Sá, governor-general of the Portuguese colony of Brazil. At the same time the city of São Sebastião do Rio de Janeiro was founded by Mem de Sá's cousin. The settlement was captured and held for ransom by the French in 1711. Rio gained importance in the 18th cent., when it was designated the shipping point for all gold from the interior. It replaced Bahia (now Salvador) as the capital of Brazil in 1763 and subsequently became capital of the exiled royal court of Portugal (1808-21), the Brazilian empire (1822), and the federal republic (1889). It was superseded as capital by Brasília in 1960.
See J. E. Periman, The Myth of Marginality: Urban Poverty and Politics in Rio De Janeiro (1976); B. Weber, O Rio de Janeiro (1986); C. Pickard, The Insider's Guide to Rio de Janeiro (1986).
The Rio Grande is an important source of internationally regulated irrigation, a use it has long been put to. Pueblos were thriving on its banks N of Las Cruces, N.Mex., and the Native Americans were practicing irrigation of the arid country, when Spanish explorer Francisco Vásquez de Coronado arrived (1540). Today, dams on the Rio Grande are used for irrigation, flood control, and regulation of the river flow. Elephant Butte Dam (completed 1916) and Caballo Dam (completed 1938) in New Mexico create reservoirs that serve large areas. Further downstream N of Del Rio, Tex., is the Amistad Dam (completed 1969); it is 6 mi (9.7 km) long and impounds a huge reservoir; Amistad National Recreation Area is there. Below Laredo are Falcon Dam (completed 1954) and its large reservoir. Near the mouth of the Rio Grande is the irrigation-dependent citrus-fruit and truck-farm region commonly called the Rio Grande Valley and developed principally in the 1920s. An agreement between the United States and Mexico in 1944 provided for future distribution of the river's water, but in drought years the amount reaching the United States is often less than what is called for under the treaty.
Shifts in the river's channel have led to border disputes between the United States and Mexico. Parts of its bed have been stabilized by canalization, and an international border commission mediates disputes. The 114-year controversy over the location of the border at El Paso was finally settled in 1968 when the water of the Rio Grande was diverted into a concrete channel. A 191-mi (307-km) section of the river on the American shore below Big Bend National Park is protected as the Rio Grande Wild and Scenic River (see National Parks and Monuments, table).
See R. E. Riecker, Rio Grande Rift (1979); P. Horgan, Great River: The Rio Grande in North American History (2 vol., 1984).
See study by E. F. Burns (1966).
City (pop., 2005 est.: city, 6,094,200; metro. area, 11,570,524), capital of Rio de Janeiro state, and port, southeastern Brazil. The site was founded by the Portuguese in the early 16th century and became important in the 18th century as an outlet for mineral exports from gold and diamond mines. Located on one of the largest harbours in the world and known for its scenic views, it was the capital of Brazil from 1822 to 1960, when the national capital was moved to Brasília. It is the country's second largest manufacturing centre, after São Paulo. Major industries include metallurgy, electronics, and food processing. Noted for its wide streets, public buildings, beaches (see Copacabana), and public parks and gardens, it is a leading tourist and resort centre.
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River, North America. One of the longest rivers of North America, it flows 1,900 mi (3,000 km) from its sources in the Rocky Mountains of southwestern Colorado, U.S., to the Gulf of Mexico. It rises high in the San Juan Mountains and flows generally south, passing southeast and forming the entire border between Texas and Mexico. The earliest European settlements were along the lower course of the river in the 16th century, but many of the Pueblo Indian settlements of New Mexico date from before the Spanish conquest. During the Spanish period, the middle and upper portions were called the Río del Norte, and the lower course was called the Río Bravo. It is a major source of irrigation. At the U.S.-Mexican border, it defines the edge of Big Bend National Park, Texas.
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