valley with vegetation in aerial view and oeiras river and gradient mountains in the horizon, mértola portugal

mountain wilderness hill tree landscape nature ridge valley rock trail cliff soil adventure vegetation aerial view oeiras river gradient mountains horizon mértola portugal caldeirao range cerro ouro bushes trees hillside countryside village space for text copy wallpaper trekking water natural environment scenic beautiful summer travel destination tourism backpacking hiking outdoor green panorama viewpoint wild banks riverside stream guadiana alentejo beja mertola portuguese europe hills