The Incas used suspension bridges.
A suspension bridge isn’t a big problem in today’s society. They may be found almost everywhere. Suspension bridges, on the other hand, were cutting-edge technology back then. It was shocking for the Spanish conquistadors to see suspension bridges hanging over enormous canyons and valleys when they arrived in Peru.
Despite their arrogance, the Spaniards were unable to construct a suspension bridge. These bridges were constructed by weaving alpaca wool and grass together. They were good timekeepers, too.