Kirkdale is a valley in North Yorkshire, England, which along with Sleightholmedale makes up the larger Bransdale and carries the Hodge Beck from its moorland source near Cockayne to the River Dove and onto the River Rye in the Vale of Pickering. Corallian Limestone which outcrops on the hills surrounding the Vale of Pickering runs across the region, and this appears as an aquifer in Kirkdale swallowing most of the water from Hodge Beck, which reappears further downstream. During summer months the river bed often runs dry as most of the water takes a subterranean passage. Kirkdale is noted for a bone cave, an ancient animal den, into which scavengers such as hyenas dragged the remains of many other animals. Numerous bones can still be found in the cave today. Adjacent to the river bed can be found St Gregory's Minster, a small ancient church dating back to AD 1055 featuring a rare sundial.