Argentina

The Obelisk (El Obelisco) along Nueve de Julio Avenue in Buenos Aires. The thoroughfare, named after Argentina's independence day (9 July 1816), is generally considered the widest avenue in the world. The Obelisk, built in 1936, measures 67 meters high (220 feet) and commemorates the founding of the city.

This panorama looking southeast across the South American continent was taken from the International Space Station almost directly over the Atacama Desert near Chile's Pacific coast. The high plains (3000-5000 m, 13,000-19,000 ft) of the Andes Mountains, also known as the Puna, appear in the foreground, with a line of young volcanoes (dashed line) facing the much lower Atacama Desert (1000-2000 m elevation). Several salt-crusted dry lakes (known as salars in Spanish) occupy the basins between major thrust faults in the Puna. Salar de Arizaro (foreground) is the largest of the dry lakes in this view. The Atlantic Ocean coastline, where Argentina's capital city of Buenos Aires sits along the Río de la Plata, is dimly visible at image top left. Near image center, the transition (solid line) between two distinct geological zones, the Puna and the Sierras Pampeanas, creates a striking landscape contrast. Compared to the Puna, the Sierras Pampeanas mountains are lower in elevation and have fewer young volcanoes. Sharp-crested ridges are separated by wide, low valleys in this region. The Salinas Grandes - ephemeral shallow salt lakes - occupies one of these valleys. The general color change from reds and browns in the foreground to blues and greens in the upper part of the image reflects the major climatic regions: the deserts of the Atacama and Puna versus the grassy plains of central Argentina, where rainfall is sufficient to promote lush prairie grass, known locally as the pampas. The Salinas Grandes mark an intermediate, semiarid region. Image courtesy of NASA.

A view of Laguna de Horcones at 2,950 m in Parque Provincial Aconcagua, Mendoza, Argentina. Snow covered Aconcagua, the largest mountain in the Western Hemisphere at 6,962 m, stands prominently in the background.

Opened as a cathedral in 1932 and architecturally completed in 2000, the Cathedral of La Plata is the largest church in Argentina and one of the top seven largest in the Western Hemisphere. At a height of 112m, it is among the six tallest churches in the Americas.

The Parana is the second longest river is South America; its delta is a huge forested marshland about 32 km (20 mi) northeast of Buenos Aires. The area is a very popular tourist destination with guided boat tours that venture into this vast labyrinth of marsh and trees. The Parana River delta is one of the world's greatest bird-watching destinations. This false color satellite image highlights the striking contrast between dense forest and wetland marshes (deep red and violet), and the winding blue ribbon of the Parana River. The large north-south-trending water body on the right is the Uruguay River. Image courtesy of USGS.

The Rio Parana in Argentina (running north-south through image center) appears brown from its sediment; it eventually drains into the Delta del Parana and the Rio de la Plata estuary. Where the Rio de la Plata empties into the Atlantic, the brown, sediment-filled river water mixes with clearer ocean water and creates swirls and cloudy formations. Visible in this image (in gray) is Buenos Aires, the capital city of Argentina, located where the Rio Parana meets the Rio de la Plata. Montevideo, Uruguay's capital, is located on the opposite side of the Rio de la Plata. Photo courtesy of NASA.