A favorite walk for us as we visit the Yorkshire Dales near Settle again. Trow Gill, a wooded limestone ravine at the head of the 'Reginald Farrer' nature trail at the village of Claham. Now a dry gorge, Trow Gill was possibly once an underground cavern formed by waters which now take an alternative route through the Ingleborough Cave / Gaping Gill system. At some point in time the roof of this cavern is believed to have collapsed - Trow Gill being the suggested result (though other theories have the ravine as simply a glacial meltwater channel). (http://www.yorkshire-dales.com/trow-gill.html)

Nice full screen.