buttertubs limestone potholes between wensleydale and swaledale, yorkshire dales, north yorkshire, england

rock tree terrain stream cliff flower water waterfall plant green river geology nature jungle garden waterway trail wall buttertubs limestone potholes pass b6270 wensleydale swaledale yorkshire dales north england duncan brown natural beautiful stone scenic park tourism landscape outdoor pothole simonstone hawes thwaite muker hardraw road sinkhole