hill walking the norber eratics around austwick in craven in the yorkshire dales

austwick background blue challenge countryside craven dale dales district drystone erratics farm glacial glaciation grazing green hike hiking hill ingleborough land landscape limestone meadow meadows mountain mountains national norber north outdoor panoramic park pasture pavement peaks penyghent rambling route rural settle sheep sky stone three tourism travel view wainwright walking walks walling yorkshire