![](https://eveharms.com/wp-content/uploads/2021/05/aspidochelone_by_janiceduke_d5fffjx-fullview-web.jpg)
The Aspidochelone is creature, found in medieval bestiaries, that appears to be an island with trees, dunes, and rocky crevices—but is in reality a giant whale, sea turtle, or other sea monster. Sailors who unwittingly explored the ‘island’ found their ships and themselves in peril. Image: JaniceDuke