Various means were used to bridge water courses. Rafts were used to cross wide meandering rivers. Bridges built of stone or floating reeds were used in marshy highlands. Inca rope bridges provided access across narrow valleys. A bridge across the Apurimac River, west of Cuzco, spanned a distance of 45 meters. Ravines were sometimes crossed by hanging baskets, or oroya, which could span distances of over 50 meters. Bridges were sometimes built in pairs.
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