garganta de los infiernos natural reserve, extremadura, spain

pilones bidge pedestrian garganta infiernos reserve extremadura spain travel people two women cane visitors jerte river huge granite roundshaoed forms fluvial erosion cold turquoise crystalline water rock stairs handrail upper early autumn season sierra tormantos gredos valley natural space hells gorge southwestern side tornacavas cabezuela del valle mountains hills gneiss hydrographic network blue sky