Itaipu (Guarani: Itaipu, Portuguese: Itaipu, Spanish: Itaipú; pronounced [itaj'pu]) is a dam of the Paraná River that includes a hydroelectric power plant, located on the border between Brazil and Paraguay. The name "Itaipu" was taken from an isle that existed near the construction site. Itaipu, from the Guarani language, means "singing stones".

Itaipu Binacional is a company that runs the largest operational hydroelectric power plant in the world ^[1]. It is a binational undertaking run by Brazil and Paraguay at the Paraná River on the border section between the two countries, 15 km north of the Friendship Bridge. The project ranges from Foz do Iguaçu, in Brazil, and Ciudad del Este in Paraguay, in the south to Guaíra and Salto del Guairá in the north. The installed generation capacity of the plant is 14 GW, with 20 generating units of 700 MW each. In the year 2000 it achieved its generating record of 93.4 billion kilowatt-hours (kWh), which supplied 95% of the energy consumed by Paraguay and 24% of that consumed by Brazil.