Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Qhapaq Ñan, Andean Road System' has mentioned 'Valley' in the following places:
Occurrence Sentence Text Source
A very special stone bridge was recently discovered in Bolivia consisting of a relatively small opening to allow the stream to flow and a quite imposing stone embankment filling the valley sides in order to allow the road to pass on top of it.
To access the famous Apurxc3xadmac rope bridge it was necessary for the road to reach the narrowest section of the gorge: to this end, the road was cut along a natural fault into the steep rock of the valley and a tunnel was carved to facilitate the way.