Teatro Colon

"The Teatro Colon..in Buenos Aires, Argentina, is one of the most famous opera houses in the world. The present theatre, the second with that name, opened in 1908 after twenty years under construction. It has 2,367 seats, standing room for 1,000 and a stage which is 20 m wide, 15 m high and 20 m deep."

http://en.wikipedia.org/wiki/Teatro_Col%C3%B3n

Obelisk of Buenos Aires

"The obelisk is one of the main icons of the city, and a venue for various cultural activities (usually sponsored by the city government) and other events. It is the traditional gathering spot for sports fans to celebrate when their favourite team wins, especially from the national football team, often resulting in colorful events that attract media coverage. It was also used by several acrobatic troupes to perform high-wire acts."

http://en.wikipedia.org/wiki/Obelisco

Cueva de las Manos

"The Cave lies in the valley of the Pinturas River, in an isolated spot in the Patagonian landscape, some 100 km (62 mi) from the main road, National Route 40. It is famous (and gets its name) for the paintings of hands, made by the indigenous inhabitants (possibly forefathers of the Tehuelches) some 9,000 years ago. The composition of the inks is mineral, so the age of the paintings was calculated from the remains of bone-made pipes used for spraying the paint on the wall blocked by the hand."

http://en.wikipedia.org/wiki/Cueva_de_las_Manos

Iguazu Falls

"Upon seeing Iguazu, First Lady Eleanor Roosevelt reportedly exclaimed "Poor Niagara!" Vastly larger than North America's Niagara Falls, Iguazu is rivalled only by Southern Africa's Victoria Falls.."

http://en.wikipedia.org/wiki/Iguazu_Falls

Valdes Peninsula

"It is an important nature reserve which was listed as a World Heritage Site by UNESCO in 1999. The coastline is inhabited by marine mammals, like sea lions, elephant seals and fur seals."

http://en.wikipedia.org/wiki/Pen%C3%ADnsula_Vald%C3%A9s

Ischigualasto

"The Ischigualasto Formation contains Late Triassic (Carnian) deposits (230 million years before the present), with some of the oldest known dinosaur remains, which are the world's first with regards to quality, number and importance."

http://en.wikipedia.org/wiki/Ischigualasto

Quebrada de Humahuaca

"It has been populated for 10,000 years, since the settlement of the first hunter-gatherers, which is evidenced by substantial prehistoric remains. It was a caravan road for the Inca Empire in the 15th century, then an important link between the Viceroyalty of the Ro de la Plata and the Viceroyalty of Peru, as well as a stage for many battles of the Argentine War of Independence."

http://en.wikipedia.org/wiki/Quebrada_de_Humahuaca