collapsed rocky boulders fall down from sandstone rocks and landslide blocked forest path

accident adrenaline alert avalanche bank blocked bohemian border boulder canyon caution cesky clay clayey clayeysoil claystone cliff cliffs closed coastline collapse collapsed crag crash creek czech danger debris demolished destroyed entry erosion european explaining fall fence forest gravel hruboskalske hruboskalsko killing landscape landslide large mountain mountains mud natural not paradise pieces prachov prachovske protected raj republic reserve risk road rocks rocky sand sandstone sandstones skaly slide soil stone target tourism tourist tower travel view way zone