Hippo's Yawn is a rock near Wave Rock in Western Australia. The rock's resemblance to a yawning hippopotamus led to its name. It is about 12.6 metres tall and is located just out of the town of Hyden.
Wikipedia https://en.wikipedia.org/wiki/Hippo's_Yawn
Address 6359, Australia
Coordinates -32°26'34.075" N 118°54'17.312" E