Itaipu Dam

Itaipu Dam, originally uploaded by Tak from HK.

This is one of the seven wonders of the modern world. And it is really huge that it provide 90% of electricity of Paraguay and 20% of Brazil!

I do not know what is the environment impact they made to the surrounding but I know that they put lots of money for image promotion. Why I know? The tour to the dam is free of charge!