lower duden waterfalls antalya turkey cliff

arapsu bridge roman antalya turkey stoneroman stone footbridge greek colony olbia masonry arch car transport channel canyon koprulu ancient ruins history ground turkish national park province ministry forest river fish oluklu 3000 years ages drone perserved arapsuyu districk long construction moving koprula waterfalls hike hiking middle cliff visitor view point rugged stoney hill lower duden boat trip eastern trees tall tree green history