Kirkdale Cave is a cave located in Kirkdale near Kirkbymoorside in the Vale of Pickering, North Yorkshire, England. The cave was discovered by workmen in 1821, and was found to contain fossilized bones of a variety of mammals not currently found in Great Britain, including hippopotamus, the farthest north any such remains have ever been found, elephant, and the remains of numerous cave hyenas. William Buckland analyzed the cave and its contents in 1822. He determined that the bones were from the remains of animals brought into the cave by hyenas who had been using it for a den, and not a result of the biblical flood floating animal remains in from distant lands as had first been thought.