Wave Rock - Hippo Yawn

Around 1km east of Wave Rock is Hippo's Yawn, a granite cave eroded from the base of a big orange boulder, which does indeed resemble the gaping jaws of a Hippo. The rock's resemblance to a yawning hippopotamus which led to its name.
It is about 12.6 metres (41 ft) tall and is located just outside of the town of HydenLæs mere