Itaipu Dam has a lot of different things to offer to the visitors. Their best attraction is the guided tour inside the dam, where you'll be able to see it in details.
I took the panoramic tour twice, one during the day and one during the night, and actually they're quite different, although i preferred the nightvisit.
on the panoramic tour during the day, you circle throughout the whole dam, with 2 stops to take some quick pictures, one in front of the Dam and the other above, after passing just in front of the many huge water turbines and above the spillway (which was not open, sadly).
During the night visit, you won't go to the upper part of the Dam, but will be able to see a mini show with some music as they start to light up the Dam! It is a very beautiful and impressive show which i'd recommend to everyone. And when you get to the bus, go to the upper deck and stay on the eastern seats of the bus in order to be closer to the huge turbines as the bus passes in front of them.
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