national park sierra de gredos, avila, spain

active activities activity altitude arenas art arts attraction attractions avila beautiful castile castilla destination destinations eco ecological ecology gredos hike hiking holiday holidays land landart landmark landmarks landscape landscapes leon meadow montagne mountain mountains national natural nature nave panorama park pedro province pure rough san scene scenery scenic scenics sierra spain spanish sport sports spring springtime summer summertime summit summits tour tourism tourist touristic tours travel traveling trek trekking trekkings vacation view viewing walk walking walks wellness wildlife