gorge in torrente cosa at grotte di pradis in friuli, italy

grotte di pradis cave landscape italy countryside august summer nature river gorge creek cavern grotto canyon ravine chasm gully waterfall falls formation erosion water eroded route trail geology karst karstic brook stream rural travel tourism alpine trees woods woodland footbridge pedestrian bridge walkway carnia carnic alps mountains friuli venezia giulia prealps italian european union eu outside outdoors outdoor limestone natural rock north east south northern eastern southern sotto pordenone elevated crossing path torrente cosa scenic scene scenery walking hiking green