1 One of the largest cities in South America , Buenos Aires is the capital of Argentina .
2 It is one of the world's most important ports and most populous cities .

1 One of the largest cities in South America , Buenos Aires is the capital of Argentina .
89 The port of Buenos Aires is the largest in South America .

2 The Spanish colonists named the city for the "good winds" that brought them to the port .
5 According to tradition , 16th-century Spanish sailors named the port for their patron saint , Santa Maria del Buen Aire ( St . Mary of the Good Air) .

3 The city is also the country's leading port and center of commerce , politics , and culture .
6 The city is the national centre of commerce , industry , politics , and culture .

5 It lies at the northeastern edge of the flat plain known as the Pampa , which occupies the heartland of Argentina .
36 The city of Buenos Aires is located at the northeastern edge of the flat plain known as the Pampa , which occupies the heartland of Argentina .

6 The city is situated at the point where the Parana River delta widens to meet the Rio de la Plata .
1 city , Federal District , and capital of Argentina , situated on the shore of the Rio de la Plata , 150 miles ( 240 kilometres ) from the Atlantic Ocean .

6 The city is situated at the point where the Parana River delta widens to meet the Rio de la Plata .
37 It is situated at the point where the Parana River delta widens to meet the Rio de la Plata .

6 The city is situated at the point where the Parana River delta widens to meet the Rio de la Plata .
38 The eastern and northern limits of the metropolitan area are defined by the Rio de la Plata , and the city's most prominent physical characteristics are the numerous small rivers that flow through its periphery .

6 The city is situated at the point where the Parana River delta widens to meet the Rio de la Plata .
170 Two extensive parks that were built on reclaimed floodlands are the Almirante Brown Park , in the Riachuelo Valley , and the Tres de Febrero Park , on the Rio de la Plata .

7 Buenos Aires has green areas that include plazas , parks , and wide tree-lined avenues .
169 The city is ringed with espacios verdes ( "green areas" ) , which include plazas , parks , and tree-lined boulevards .

10 The most important of the city's theaters is the Colon Theatre .
157 The most important of the city's theatres is the Colon Theatre , which is the opera house as well as the headquarters of the national ballet and the national symphony .

11 It is an opera house as well as the headquarters of the national ballet and the national symphony .
157 The most important of the city's theatres is the Colon Theatre , which is the opera house as well as the headquarters of the national ballet and the national symphony .

12 Amateur theater groups are active , and there is an open-air stage in La Boca .
160 Amateur theatre groups are active , and there is an open-air stage in La Boca .

13 The city's museums house varied collections .
162 The city's museums -- several of which are run by the municipal government -- house varied collections .

14 The Bernardino Rivadavia Argentine Museum of Natural Sciences has an exceptionally rich fossil collection and runs a scientific institute .
163 The Bernardino Rivadavia Argentine Museum of Natural Sciences has an exceptionally rich fossil collection and operates a scientific institute .

15 The National Museum of Fine Arts contains collections of world masters and of Argentine painters and sculptors .
164 The National Museum of Fine Arts contains collections of world masters and of Argentine painters and sculptors , while the National Museum of Decorative Arts houses tapestries and antiques .

16 The National Museum of Decorative Arts houses tapestries and antiques .
164 The National Museum of Fine Arts contains collections of world masters and of Argentine painters and sculptors , while the National Museum of Decorative Arts houses tapestries and antiques .

17 Buenos Aires is the nation's chief port and the largest in South America .
89 The port of Buenos Aires is the largest in South America .

18 It is the country's processing and shipping center .
87 Buenos Aires is the country's chief point of consumption , processing , and shipping .

20 About half of all manufacturing jobs are located here .
95 More than one-third of the industrial capacity of the country is in the Buenos Aires metropolitan area , and about one-half of all manufacturing jobs are located there .

21 The main industries include food processing , metalworking , automobile assembly , oil refining , and printing and publishing .
97 The main industries include food processing ( meat , fish , and grain ) , metalworking , automobile assembly , oil refining , printing and publishing , and the manufacture of textiles , beverages , paper , and chemicals .

22 The city also produces textiles , beverages , paper , and chemicals .
97 The main industries include food processing ( meat , fish , and grain ) , metalworking , automobile assembly , oil refining , printing and publishing , and the manufacture of textiles , beverages , paper , and chemicals .

23 Most of the banking activity of the country is also located in Buenos Aires .
101 The city virtually monopolizes the banking activity of the country .

25 Juan de Garay , a Spaniard , led an expedition to the Rio de la Plata region .
170 Two extensive parks that were built on reclaimed floodlands are the Almirante Brown Park , in the Riachuelo Valley , and the Tres de Febrero Park , on the Rio de la Plata .

25 Juan de Garay , a Spaniard , led an expedition to the Rio de la Plata region .
177 It was first founded in 1536 by an expedition led by the Spaniard Pedro de Mendoza , who had been made the first governor general of the Rio de la Plata region .

25 Juan de Garay , a Spaniard , led an expedition to the Rio de la Plata region .
192 Their links with the port on the Rio de la Plata were of little consequence .

26 There , at the mouth of the Rio Riachuelo , he founded the city in 1580 .
179 Nearly 50 years later Juan de Garay led a more substantial expedition back to the site , and there , at the mouth of the Rio Riachuelo , he refounded Nuestra Sen~ora Santa Maria del Buen Aire in 1580 .

27 In the last quarter of the 17th century and the first half of the 18th , settlements spread rapidly to the northwest along the banks of the Parana River .
194 In the last quarter of the 17th century and the first half of the 18th , settlements spread rapidly to the northwest along the banks of the Parana River , a fertile area well irrigated by many streams and small rivers; these were easily navigated by small boats operated by smugglers who reached the many farms and ranches that lined the river .

28 By the middle of the 18th century , Buenos Aires had become a thriving center of trade .
197 By the middle of the 18th century , Buenos Aires was a thriving , if still modest commercial entrepot of nearly 20,000 inhabitants .

30 During and after World War II , industrial growth contributed to the city's expansion and reinforced its political and economic dominance of the country .
250 The broad avenues in the core of the city , most of them carved out during the 1920s and '30s , continue to carry the burden of vehicular traffic , and only one of the five subway lines was built after World War II .