The River Eden starts its life up on Black Fell Moss in the Mallerstang valley. By the time it’s made its way out of Mallerstang into the Vale of Eden, it starts cutting through the brockram rock (a type of mix of limestone and sandstone). South of Kirkby Stephen, at Stenkrith Park, the Eden drops dramatically into a gorge called Coopkarnel, otherwise known as the Devil’s Grinding Mill. It’s a spectacular sight from the Millennium Bridge, and the roaring sound makes your tummy flip in awe of the forces involved.