On my second day in the Paraná area I spent the morning on the border between Brazil and Paraguay, visiting the World’s largest hydro-electric power-plant — the Itaipu Dam. My initial plan had been to take the full tour of the dam — visiting it inside-out. However, I arrived a bit late at the site and without having made a reservation. The morning tour was fully booked and taking the afternoon tour was not an option as I wanted to avoid risking missing the last bus to Argentina. I did thus settle for a panoramic tour of the exterior part of the power-plant.