Kilauea caldera floor slump, see the fragment of the old road?
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/9998127@N06">Bill Abbott</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/wbaiv/46778508895/">Kilauea caldera floor slump, see the fragment of the old road? DSC_0616</a>