Rather than taking the paved bridge, take this old wooden bridge. The slope is a bit steep coming from Potosi, and the path is damaged, but it's easily accessible by bike. The bridge spans the Rio Pilcomayo in the most elegant way. The wooden floor rests on a metal structure supported by long cables. It's possible to climb to the top of the towers via a staircase on the left bank. Be careful, if you're afraid of heights, don't attempt to climb.