Hippo’s Yawn in Hyden, Western Australia, is a granite rock formation located near Wave Rock. The formation is commonly visited as part of the Wave Rock area. Visitors can walk to the site, pass through the rock opening, and take photographs of its distinctive shape. Its name comes from its resemblance to a hippopotamus with its mouth open, and nearby places include a coffee shop, a wildlife park, a replica Pioneer Town, and the Wildflower Shop.