beautiful glass sky walk at viewpoint new landmark thailand skywalk, at phra yai phu khok ngio chiang khan district, loei province

asia attraction background balcony beautiful blue chiang china cliff fence glass high holiday horizontal khan khok landmark landscape laos leisure loei mekong misty mountain national natural nature ngio observation outdoor park pathway phra phu river scenery sky skywalk summer sunset thailand tianmen tourism tourist travel tropical unseen view walk water yai zhangjiajie