Morning Reef, Abrolhos Islands, WA. The little blue spot slightly left of the middle marks the hole in the reef where Batavia ran aground.
<a href="//commons.wikimedia.org/wiki/User:Vunz" title="User:Vunz">Vunz</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>