trollers gill, skyreholme, grassington, yorkshire, dales, north yorkshire, uk

rock mountain geology tree wilderness hill landscape terrain flower nature soil trail ridge ruins valley grass plant cliff wall trollers gill skyreholme grassington yorkshire dales north beautiful stone natural limestone england gorge pass trollerdale troll sink hole spring beck stream brook trees climbing dry caves pothole hell lead fluorspar stump cross caverns grimwith shade old man buttress scenery parcevall shake shakehole appletreewick