The Itaipú hydroelectric power plant is the largest development of its kind in operation in the world, built from 1975 to 1991. The magnitude of the project can also be demonstrated by the fact that in 1995 Itaipú alone responded for 25% of the energy supply in Brazil and 78% in Paraguay. The power plant is also a major tourism attraction in the Foz do Iguaçú area, having received around 9 million visitors from 162 countries. The Brazilian city of Foz do Iguaçu, also home of the famous Iguaçú Falls, is located at the Western tip of Paraná State, right by the border with Paraguay and Argentina.

 
The Itaipú hydroelectric power plant, located 14 kilometers North of the International Bridge linking the cities of Foz do Iguaçú, Brazil, and Ciudad del Este, Paraguay, consists of a series of various types of dams a total distance of 7,744 meters with a crest elevation of 225 meters.

Source: www.wonderclub.com/AllWorldWonders.html