They came finally to the verge of a small green valley of sparse trees. (bookbrowse.com)
Well, from 350 km (~ 220 miles) up civilization looks like clusters of lights nestled in river valleys and practically overflowing into the oceans or other bodies of water. (scientificamerican.com)
From their mountain - top location they maintained control over the central valleys for a period of nearly thirteen centuries. (tripsavvy.com)